257078705

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{2819}}^1$

素因数の和:2921

約数の個数: 32

約数和(自身を含む): 352477440

約数和(自身を除く): 95398735

約数列:

[1, 5, 13, 23, 61, 65, 115, 299, 305, 793, 1403, 1495, 2819, 3965, 7015, 14095, 18239, 36647, 64837, 91195, 171959, 183235, 324185, 842881, 859795, 2235467, 3955057, 4214405, 11177335, 19775285, 51415741, 257078705]

約数ペア:

[(1, 257078705), (5, 51415741), (13, 19775285), (23, 11177335), (61, 4214405), (65, 3955057), (115, 2235467), (299, 859795), (305, 842881), (793, 324185), (1403, 183235), (1495, 171959), (2819, 91195), (3965, 64837), (7015, 36647), (14095, 18239)]