20980076

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{4861}}^1$

素因数の和:4961

約数の個数: 24

約数和(自身を含む): 40023984

約数和(自身を除く): 19043908

約数列:

[1, 2, 4, 13, 26, 52, 83, 166, 332, 1079, 2158, 4316, 4861, 9722, 19444, 63193, 126386, 252772, 403463, 806926, 1613852, 5245019, 10490038, 20980076]

約数ペア:

[(1, 20980076), (2, 10490038), (4, 5245019), (13, 1613852), (26, 806926), (52, 403463), (83, 252772), (166, 126386), (332, 63193), (1079, 19444), (2158, 9722), (4316, 4861)]