20881600

素因数分解:

$2^6\times 5^2\times {\mathrm{31}}^1\times {\mathrm{421}}^1$

素因数の和:474

約数の個数: 84

約数和(自身を含む): 53165248

約数和(自身を除く): 32283648

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 31, 32, 40, 50, 62, 64, 80, 100, 124, 155, 160, 200, 248, 310, 320, 400, 421, 496, 620, 775, 800, 842, 992, 1240, 1550, 1600, 1684, 1984, 2105, 2480, 3100, 3368, 4210, 4960, 6200, 6736, 8420, 9920, 10525, 12400, 13051, 13472, 16840, 21050, 24800, 26102, 26944, 33680, 42100, 49600, 52204, 65255, 67360, 84200, 104408, 130510, 134720, 168400, 208816, 261020, 326275, 336800, 417632, 522040, 652550, 673600, 835264, 1044080, 1305100, 2088160, 2610200, 4176320, 5220400, 10440800, 20881600]

約数ペア:

[(1, 20881600), (2, 10440800), (4, 5220400), (5, 4176320), (8, 2610200), (10, 2088160), (16, 1305100), (20, 1044080), (25, 835264), (31, 673600), (32, 652550), (40, 522040), (50, 417632), (62, 336800), (64, 326275), (80, 261020), (100, 208816), (124, 168400), (155, 134720), (160, 130510), (200, 104408), (248, 84200), (310, 67360), (320, 65255), (400, 52204), (421, 49600), (496, 42100), (620, 33680), (775, 26944), (800, 26102), (842, 24800), (992, 21050), (1240, 16840), (1550, 13472), (1600, 13051), (1684, 12400), (1984, 10525), (2105, 9920), (2480, 8420), (3100, 6736), (3368, 6200), (4210, 4960)]