21126259

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{151}}^1$

素因数の和:271

約数の個数: 32

約数和(自身を含む): 28016640

約数和(自身を除く): 6890381

約数列:

[1, 7, 11, 23, 77, 79, 151, 161, 253, 553, 869, 1057, 1661, 1771, 1817, 3473, 6083, 11627, 11929, 12719, 19987, 24311, 38203, 83503, 131219, 139909, 267421, 274367, 918533, 1920569, 3018037, 21126259]

約数ペア:

[(1, 21126259), (7, 3018037), (11, 1920569), (23, 918533), (77, 274367), (79, 267421), (151, 139909), (161, 131219), (253, 83503), (553, 38203), (869, 24311), (1057, 19987), (1661, 12719), (1771, 11929), (1817, 11627), (3473, 6083)]