21089765

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{103}}^1\times {\mathrm{1321}}^1$

素因数の和:1460

約数の個数: 16

約数和(自身を含む): 26397696

約数和(自身を除く): 5307931

約数列:

[1, 5, 31, 103, 155, 515, 1321, 3193, 6605, 15965, 40951, 136063, 204755, 680315, 4217953, 21089765]

約数ペア:

[(1, 21089765), (5, 4217953), (31, 680315), (103, 204755), (155, 136063), (515, 40951), (1321, 15965), (3193, 6605)]