21207016

素因数分解:

$2^3\times {\mathrm{61}}^1\times {\mathrm{43457}}^1$

素因数の和:43524

約数の個数: 16

約数和(自身を含む): 40415940

約数和(自身を除く): 19208924

約数列:

[1, 2, 4, 8, 61, 122, 244, 488, 43457, 86914, 173828, 347656, 2650877, 5301754, 10603508, 21207016]

約数ペア:

[(1, 21207016), (2, 10603508), (4, 5301754), (8, 2650877), (61, 347656), (122, 173828), (244, 86914), (488, 43457)]