21214739

素因数分解:

$7^1\times {\mathrm{13}}^2\times {\mathrm{79}}^1\times {\mathrm{227}}^1$

素因数の和:339

約数の個数: 24

約数和(自身を含む): 26703360

約数和(自身を除く): 5488621

約数列:

[1, 7, 13, 79, 91, 169, 227, 553, 1027, 1183, 1589, 2951, 7189, 13351, 17933, 20657, 38363, 93457, 125531, 233129, 268541, 1631903, 3030677, 21214739]

約数ペア:

[(1, 21214739), (7, 3030677), (13, 1631903), (79, 268541), (91, 233129), (169, 125531), (227, 93457), (553, 38363), (1027, 20657), (1183, 17933), (1589, 13351), (2951, 7189)]