639940000

素因数分解:

$2^5\times 5^4\times 7^2\times {\mathrm{653}}^1$

素因数の和:697

約数の個数: 180

約数和(自身を含む): 1834189434

約数和(自身を除く): 1194249434

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 25, 28, 32, 35, 40, 49, 50, 56, 70, 80, 98, 100, 112, 125, 140, 160, 175, 196, 200, 224, 245, 250, 280, 350, 392, 400, 490, 500, 560, 625, 653, 700, 784, 800, 875, 980, 1000, 1120, 1225, 1250, 1306, 1400, 1568, 1750, 1960, 2000, 2450, 2500, 2612, 2800, 3265, 3500, 3920, 4000, 4375, 4571, 4900, 5000, 5224, 5600, 6125, 6530, 7000, 7840, 8750, 9142, 9800, 10000, 10448, 12250, 13060, 14000, 16325, 17500, 18284, 19600, 20000, 20896, 22855, 24500, 26120, 28000, 30625, 31997, 32650, 35000, 36568, 39200, 45710, 49000, 52240, 61250, 63994, 65300, 70000, 73136, 81625, 91420, 98000, 104480, 114275, 122500, 127988, 130600, 140000, 146272, 159985, 163250, 182840, 196000, 228550, 245000, 255976, 261200, 319970, 326500, 365680, 408125, 457100, 490000, 511952, 522400, 571375, 639940, 653000, 731360, 799925, 816250, 914200, 980000, 1023904, 1142750, 1279880, 1306000, 1599850, 1632500, 1828400, 2285500, 2559760, 2612000, 2856875, 3199700, 3265000, 3656800, 3999625, 4571000, 5119520, 5713750, 6399400, 6530000, 7999250, 9142000, 11427500, 12798800, 13060000, 15998500, 18284000, 19998125, 22855000, 25597600, 31997000, 39996250, 45710000, 63994000, 79992500, 91420000, 127988000, 159985000, 319970000, 639940000]

約数ペア:

[(1, 639940000), (2, 319970000), (4, 159985000), (5, 127988000), (7, 91420000), (8, 79992500), (10, 63994000), (14, 45710000), (16, 39996250), (20, 31997000), (25, 25597600), (28, 22855000), (32, 19998125), (35, 18284000), (40, 15998500), (49, 13060000), (50, 12798800), (56, 11427500), (70, 9142000), (80, 7999250), (98, 6530000), (100, 6399400), (112, 5713750), (125, 5119520), (140, 4571000), (160, 3999625), (175, 3656800), (196, 3265000), (200, 3199700), (224, 2856875), (245, 2612000), (250, 2559760), (280, 2285500), (350, 1828400), (392, 1632500), (400, 1599850), (490, 1306000), (500, 1279880), (560, 1142750), (625, 1023904), (653, 980000), (700, 914200), (784, 816250), (800, 799925), (875, 731360), (980, 653000), (1000, 639940), (1120, 571375), (1225, 522400), (1250, 511952), (1306, 490000), (1400, 457100), (1568, 408125), (1750, 365680), (1960, 326500), (2000, 319970), (2450, 261200), (2500, 255976), (2612, 245000), (2800, 228550), (3265, 196000), (3500, 182840), (3920, 163250), (4000, 159985), (4375, 146272), (4571, 140000), (4900, 130600), (5000, 127988), (5224, 122500), (5600, 114275), (6125, 104480), (6530, 98000), (7000, 91420), (7840, 81625), (8750, 73136), (9142, 70000), (9800, 65300), (10000, 63994), (10448, 61250), (12250, 52240), (13060, 49000), (14000, 45710), (16325, 39200), (17500, 36568), (18284, 35000), (19600, 32650), (20000, 31997), (20896, 30625), (22855, 28000), (24500, 26120)]