21056039420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{80984767}}^1$

素因数の和:80984789

約数の個数: 24

約数和(自身を含む): 47619043584

約数和(自身を除く): 26563004164

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 80984767, 161969534, 323939068, 404923835, 809847670, 1052801971, 1619695340, 2105603942, 4211207884, 5264009855, 10528019710, 21056039420]

約数ペア:

[(1, 21056039420), (2, 10528019710), (4, 5264009855), (5, 4211207884), (10, 2105603942), (13, 1619695340), (20, 1052801971), (26, 809847670), (52, 404923835), (65, 323939068), (130, 161969534), (260, 80984767)]