21515265

素因数分解:

$3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{11119}}^1$

素因数の和:11173

約数の個数: 24

約数和(自身を含む): 38163840

約数和(自身を除く): 16648575

約数列:

[1, 3, 5, 9, 15, 43, 45, 129, 215, 387, 645, 1935, 11119, 33357, 55595, 100071, 166785, 478117, 500355, 1434351, 2390585, 4303053, 7171755, 21515265]

約数ペア:

[(1, 21515265), (3, 7171755), (5, 4303053), (9, 2390585), (15, 1434351), (43, 500355), (45, 478117), (129, 166785), (215, 100071), (387, 55595), (645, 33357), (1935, 11119)]