21285845

素因数分解:

$5^1\times 7^2\times {\mathrm{283}}^1\times {\mathrm{307}}^1$

素因数の和:609

約数の個数: 24

約数和(自身を含む): 29915424

約数和(自身を除く): 8629579

約数列:

[1, 5, 7, 35, 49, 245, 283, 307, 1415, 1535, 1981, 2149, 9905, 10745, 13867, 15043, 69335, 75215, 86881, 434405, 608167, 3040835, 4257169, 21285845]

約数ペア:

[(1, 21285845), (5, 4257169), (7, 3040835), (35, 608167), (49, 434405), (245, 86881), (283, 75215), (307, 69335), (1415, 15043), (1535, 13867), (1981, 10745), (2149, 9905)]