21065715

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{42557}}^1$

素因数の和:42579

約数の個数: 24

約数和(自身を含む): 39834288

約数和(自身を除く): 18768573

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 165, 495, 42557, 127671, 212785, 383013, 468127, 638355, 1404381, 1915065, 2340635, 4213143, 7021905, 21065715]

約数ペア:

[(1, 21065715), (3, 7021905), (5, 4213143), (9, 2340635), (11, 1915065), (15, 1404381), (33, 638355), (45, 468127), (55, 383013), (99, 212785), (165, 127671), (495, 42557)]