21587715

素因数分解:

$3^4\times 5^1\times {\mathrm{151}}^1\times {\mathrm{353}}^1$

素因数の和:521

約数の個数: 40

約数和(自身を含む): 39064608

約数和(自身を除く): 17476893

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 151, 353, 405, 453, 755, 1059, 1359, 1765, 2265, 3177, 4077, 5295, 6795, 9531, 12231, 15885, 20385, 28593, 47655, 53303, 61155, 142965, 159909, 266515, 479727, 799545, 1439181, 2398635, 4317543, 7195905, 21587715]

約数ペア:

[(1, 21587715), (3, 7195905), (5, 4317543), (9, 2398635), (15, 1439181), (27, 799545), (45, 479727), (81, 266515), (135, 159909), (151, 142965), (353, 61155), (405, 53303), (453, 47655), (755, 28593), (1059, 20385), (1359, 15885), (1765, 12231), (2265, 9531), (3177, 6795), (4077, 5295)]