19802705

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{17921}}^1$

素因数の和:17956

約数の個数: 16

約数和(自身を含む): 27098064

約数和(自身を除く): 7295359

約数列:

[1, 5, 13, 17, 65, 85, 221, 1105, 17921, 89605, 232973, 304657, 1164865, 1523285, 3960541, 19802705]

約数ペア:

[(1, 19802705), (5, 3960541), (13, 1523285), (17, 1164865), (65, 304657), (85, 232973), (221, 89605), (1105, 17921)]