20998160

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8467}}^1$

素因数の和:8511

約数の個数: 40

約数和(自身を含む): 50401536

約数和(自身を除く): 29403376

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 8467, 16934, 33868, 42335, 67736, 84670, 135472, 169340, 262477, 338680, 524954, 677360, 1049908, 1312385, 2099816, 2624770, 4199632, 5249540, 10499080, 20998160]

約数ペア:

[(1, 20998160), (2, 10499080), (4, 5249540), (5, 4199632), (8, 2624770), (10, 2099816), (16, 1312385), (20, 1049908), (31, 677360), (40, 524954), (62, 338680), (80, 262477), (124, 169340), (155, 135472), (248, 84670), (310, 67736), (496, 42335), (620, 33868), (1240, 16934), (2480, 8467)]