20378215

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{2591}}^1$

素因数の和:2631

約数の個数: 24

約数和(自身を含む): 28957824

約数和(自身を除く): 8579609

約数列:

[1, 5, 11, 13, 55, 65, 121, 143, 605, 715, 1573, 2591, 7865, 12955, 28501, 33683, 142505, 168415, 313511, 370513, 1567555, 1852565, 4075643, 20378215]

約数ペア:

[(1, 20378215), (5, 4075643), (11, 1852565), (13, 1567555), (55, 370513), (65, 313511), (121, 168415), (143, 142505), (605, 33683), (715, 28501), (1573, 12955), (2591, 7865)]