20156305

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{29}}^1\times {\mathrm{37}}^1$

素因数の和:118

約数の個数: 48

約数和(自身を含む): 29398320

約数和(自身を除く): 9242015

約数列:

[1, 5, 13, 17, 29, 37, 65, 85, 145, 185, 221, 289, 377, 481, 493, 629, 1073, 1105, 1445, 1885, 2405, 2465, 3145, 3757, 5365, 6409, 8177, 8381, 10693, 13949, 18241, 18785, 32045, 40885, 41905, 53465, 69745, 91205, 108953, 139009, 237133, 310097, 544765, 695045, 1185665, 1550485, 4031261, 20156305]

約数ペア:

[(1, 20156305), (5, 4031261), (13, 1550485), (17, 1185665), (29, 695045), (37, 544765), (65, 310097), (85, 237133), (145, 139009), (185, 108953), (221, 91205), (289, 69745), (377, 53465), (481, 41905), (493, 40885), (629, 32045), (1073, 18785), (1105, 18241), (1445, 13949), (1885, 10693), (2405, 8381), (2465, 8177), (3145, 6409), (3757, 5365)]