19806865

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{461}}^1\times {\mathrm{661}}^1$

素因数の和:1140

約数の個数: 16

約数和(自身を含む): 25690896

約数和(自身を除く): 5884031

約数列:

[1, 5, 13, 65, 461, 661, 2305, 3305, 5993, 8593, 29965, 42965, 304721, 1523605, 3961373, 19806865]

約数ペア:

[(1, 19806865), (5, 3961373), (13, 1523605), (65, 304721), (461, 42965), (661, 29965), (2305, 8593), (3305, 5993)]