21248740

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{17417}}^1$

素因数の和:17487

約数の個数: 24

約数和(自身を含む): 45356472

約数和(自身を除く): 24107732

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 17417, 34834, 69668, 87085, 174170, 348340, 1062437, 2124874, 4249748, 5312185, 10624370, 21248740]

約数ペア:

[(1, 21248740), (2, 10624370), (4, 5312185), (5, 4249748), (10, 2124874), (20, 1062437), (61, 348340), (122, 174170), (244, 87085), (305, 69668), (610, 34834), (1220, 17417)]