21039655

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{3557}}^1$

素因数の和:3595

約数の個数: 24

約数和(自身を含む): 31253472

約数和(自身を除く): 10213817

約数列:

[1, 5, 7, 13, 35, 65, 91, 169, 455, 845, 1183, 3557, 5915, 17785, 24899, 46241, 124495, 231205, 323687, 601133, 1618435, 3005665, 4207931, 21039655]

約数ペア:

[(1, 21039655), (5, 4207931), (7, 3005665), (13, 1618435), (35, 601133), (65, 323687), (91, 231205), (169, 124495), (455, 46241), (845, 24899), (1183, 17785), (3557, 5915)]