20648320

素因数分解:

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

素因数の和:456

約数の個数: 128

約数和(自身を含む): 61689600

約数和(自身を除く): 41041280

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 16, 20, 22, 28, 32, 35, 40, 44, 55, 56, 64, 70, 77, 80, 88, 110, 112, 128, 140, 154, 160, 176, 220, 224, 280, 308, 320, 352, 385, 419, 440, 448, 560, 616, 640, 704, 770, 838, 880, 896, 1120, 1232, 1408, 1540, 1676, 1760, 2095, 2240, 2464, 2933, 3080, 3352, 3520, 4190, 4480, 4609, 4928, 5866, 6160, 6704, 7040, 8380, 9218, 9856, 11732, 12320, 13408, 14665, 16760, 18436, 23045, 23464, 24640, 26816, 29330, 32263, 33520, 36872, 46090, 46928, 49280, 53632, 58660, 64526, 67040, 73744, 92180, 93856, 117320, 129052, 134080, 147488, 161315, 184360, 187712, 234640, 258104, 268160, 294976, 322630, 368720, 375424, 469280, 516208, 589952, 645260, 737440, 938560, 1032416, 1290520, 1474880, 1877120, 2064832, 2581040, 2949760, 4129664, 5162080, 10324160, 20648320]

約数ペア:

[(1, 20648320), (2, 10324160), (4, 5162080), (5, 4129664), (7, 2949760), (8, 2581040), (10, 2064832), (11, 1877120), (14, 1474880), (16, 1290520), (20, 1032416), (22, 938560), (28, 737440), (32, 645260), (35, 589952), (40, 516208), (44, 469280), (55, 375424), (56, 368720), (64, 322630), (70, 294976), (77, 268160), (80, 258104), (88, 234640), (110, 187712), (112, 184360), (128, 161315), (140, 147488), (154, 134080), (160, 129052), (176, 117320), (220, 93856), (224, 92180), (280, 73744), (308, 67040), (320, 64526), (352, 58660), (385, 53632), (419, 49280), (440, 46928), (448, 46090), (560, 36872), (616, 33520), (640, 32263), (704, 29330), (770, 26816), (838, 24640), (880, 23464), (896, 23045), (1120, 18436), (1232, 16760), (1408, 14665), (1540, 13408), (1676, 12320), (1760, 11732), (2095, 9856), (2240, 9218), (2464, 8380), (2933, 7040), (3080, 6704), (3352, 6160), (3520, 5866), (4190, 4928), (4480, 4609)]