21957980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{99809}}^1$

素因数の和:99829

約数の個数: 24

約数和(自身を含む): 50304240

約数和(自身を除く): 28346260

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 99809, 199618, 399236, 499045, 998090, 1097899, 1996180, 2195798, 4391596, 5489495, 10978990, 21957980]

約数ペア:

[(1, 21957980), (2, 10978990), (4, 5489495), (5, 4391596), (10, 2195798), (11, 1996180), (20, 1097899), (22, 998090), (44, 499045), (55, 399236), (110, 199618), (220, 99809)]