81616475

素因数分解:

$5^2\times {\mathrm{61}}^1\times {\mathrm{109}}^1\times {\mathrm{491}}^1$

素因数の和:671

約数の個数: 24

約数和(自身を含む): 104018640

約数和(自身を除く): 22402165

約数列:

[1, 5, 25, 61, 109, 305, 491, 545, 1525, 2455, 2725, 6649, 12275, 29951, 33245, 53519, 149755, 166225, 267595, 748775, 1337975, 3264659, 16323295, 81616475]

約数ペア:

[(1, 81616475), (5, 16323295), (25, 3264659), (61, 1337975), (109, 748775), (305, 267595), (491, 166225), (545, 149755), (1525, 53519), (2455, 33245), (2725, 29951), (6649, 12275)]