21723905

素因数分解:

$5^1\times 7^3\times {\mathrm{53}}^1\times {\mathrm{239}}^1$

素因数の和:318

約数の個数: 32

約数和(自身を含む): 31104000

約数和(自身を除く): 9380095

約数列:

[1, 5, 7, 35, 49, 53, 239, 245, 265, 343, 371, 1195, 1673, 1715, 1855, 2597, 8365, 11711, 12667, 12985, 18179, 58555, 63335, 81977, 88669, 90895, 409885, 443345, 620683, 3103415, 4344781, 21723905]

約数ペア:

[(1, 21723905), (5, 4344781), (7, 3103415), (35, 620683), (49, 443345), (53, 409885), (239, 90895), (245, 88669), (265, 81977), (343, 63335), (371, 58555), (1195, 18179), (1673, 12985), (1715, 12667), (1855, 11711), (2597, 8365)]