640097920

素因数分解:

$2^7\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{419}}^1$

素因数の和:487

約数の個数: 256

約数和(自身を含む): 1974067200

約数和(自身を除く): 1333969280

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 16, 20, 22, 28, 31, 32, 35, 40, 44, 55, 56, 62, 64, 70, 77, 80, 88, 110, 112, 124, 128, 140, 154, 155, 160, 176, 217, 220, 224, 248, 280, 308, 310, 320, 341, 352, 385, 419, 434, 440, 448, 496, 560, 616, 620, 640, 682, 704, 770, 838, 868, 880, 896, 992, 1085, 1120, 1232, 1240, 1364, 1408, 1540, 1676, 1705, 1736, 1760, 1984, 2095, 2170, 2240, 2387, 2464, 2480, 2728, 2933, 3080, 3352, 3410, 3472, 3520, 3968, 4190, 4340, 4480, 4609, 4774, 4928, 4960, 5456, 5866, 6160, 6704, 6820, 6944, 7040, 8380, 8680, 9218, 9548, 9856, 9920, 10912, 11732, 11935, 12320, 12989, 13408, 13640, 13888, 14665, 16760, 17360, 18436, 19096, 19840, 21824, 23045, 23464, 23870, 24640, 25978, 26816, 27280, 27776, 29330, 32263, 33520, 34720, 36872, 38192, 43648, 46090, 46928, 47740, 49280, 51956, 53632, 54560, 58660, 64526, 64945, 67040, 69440, 73744, 76384, 90923, 92180, 93856, 95480, 103912, 109120, 117320, 129052, 129890, 134080, 138880, 142879, 147488, 152768, 161315, 181846, 184360, 187712, 190960, 207824, 218240, 234640, 258104, 259780, 268160, 285758, 294976, 305536, 322630, 363692, 368720, 375424, 381920, 415648, 454615, 469280, 516208, 519560, 571516, 589952, 645260, 714395, 727384, 737440, 763840, 831296, 909230, 938560, 1000153, 1032416, 1039120, 1143032, 1290520, 1428790, 1454768, 1474880, 1527680, 1662592, 1818460, 1877120, 2000306, 2064832, 2078240, 2286064, 2581040, 2857580, 2909536, 2949760, 3636920, 4000612, 4129664, 4156480, 4572128, 5000765, 5162080, 5715160, 5819072, 7273840, 8001224, 8312960, 9144256, 10001530, 10324160, 11430320, 11638144, 14547680, 16002448, 18288512, 20003060, 20648320, 22860640, 29095360, 32004896, 40006120, 45721280, 58190720, 64009792, 80012240, 91442560, 128019584, 160024480, 320048960, 640097920]

約数ペア:

[(1, 640097920), (2, 320048960), (4, 160024480), (5, 128019584), (7, 91442560), (8, 80012240), (10, 64009792), (11, 58190720), (14, 45721280), (16, 40006120), (20, 32004896), (22, 29095360), (28, 22860640), (31, 20648320), (32, 20003060), (35, 18288512), (40, 16002448), (44, 14547680), (55, 11638144), (56, 11430320), (62, 10324160), (64, 10001530), (70, 9144256), (77, 8312960), (80, 8001224), (88, 7273840), (110, 5819072), (112, 5715160), (124, 5162080), (128, 5000765), (140, 4572128), (154, 4156480), (155, 4129664), (160, 4000612), (176, 3636920), (217, 2949760), (220, 2909536), (224, 2857580), (248, 2581040), (280, 2286064), (308, 2078240), (310, 2064832), (320, 2000306), (341, 1877120), (352, 1818460), (385, 1662592), (419, 1527680), (434, 1474880), (440, 1454768), (448, 1428790), (496, 1290520), (560, 1143032), (616, 1039120), (620, 1032416), (640, 1000153), (682, 938560), (704, 909230), (770, 831296), (838, 763840), (868, 737440), (880, 727384), (896, 714395), (992, 645260), (1085, 589952), (1120, 571516), (1232, 519560), (1240, 516208), (1364, 469280), (1408, 454615), (1540, 415648), (1676, 381920), (1705, 375424), (1736, 368720), (1760, 363692), (1984, 322630), (2095, 305536), (2170, 294976), (2240, 285758), (2387, 268160), (2464, 259780), (2480, 258104), (2728, 234640), (2933, 218240), (3080, 207824), (3352, 190960), (3410, 187712), (3472, 184360), (3520, 181846), (3968, 161315), (4190, 152768), (4340, 147488), (4480, 142879), (4609, 138880), (4774, 134080), (4928, 129890), (4960, 129052), (5456, 117320), (5866, 109120), (6160, 103912), (6704, 95480), (6820, 93856), (6944, 92180), (7040, 90923), (8380, 76384), (8680, 73744), (9218, 69440), (9548, 67040), (9856, 64945), (9920, 64526), (10912, 58660), (11732, 54560), (11935, 53632), (12320, 51956), (12989, 49280), (13408, 47740), (13640, 46928), (13888, 46090), (14665, 43648), (16760, 38192), (17360, 36872), (18436, 34720), (19096, 33520), (19840, 32263), (21824, 29330), (23045, 27776), (23464, 27280), (23870, 26816), (24640, 25978)]