20812905

素因数分解:

$3^2\times 5^1\times {\mathrm{113}}^1\times {\mathrm{4093}}^1$

素因数の和:4217

約数の個数: 24

約数和(自身を含む): 36403848

約数和(自身を除く): 15590943

約数列:

[1, 3, 5, 9, 15, 45, 113, 339, 565, 1017, 1695, 4093, 5085, 12279, 20465, 36837, 61395, 184185, 462509, 1387527, 2312545, 4162581, 6937635, 20812905]

約数ペア:

[(1, 20812905), (3, 6937635), (5, 4162581), (9, 2312545), (15, 1387527), (45, 462509), (113, 184185), (339, 61395), (565, 36837), (1017, 20465), (1695, 12279), (4093, 5085)]