21879455

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{409}}^1\times {\mathrm{823}}^1$

素因数の和:1250

約数の個数: 16

約数和(自身を含む): 28378560

約数和(自身を除く): 6499105

約数列:

[1, 5, 13, 65, 409, 823, 2045, 4115, 5317, 10699, 26585, 53495, 336607, 1683035, 4375891, 21879455]

約数ペア:

[(1, 21879455), (5, 4375891), (13, 1683035), (65, 336607), (409, 53495), (823, 26585), (2045, 10699), (4115, 5317)]