20180180

素因数分解:

$2^2\times 5^1\times {\mathrm{821}}^1\times {\mathrm{1229}}^1$

素因数の和:2059

約数の個数: 24

約数和(自身を含む): 42464520

約数和(自身を除く): 22284340

約数列:

[1, 2, 4, 5, 10, 20, 821, 1229, 1642, 2458, 3284, 4105, 4916, 6145, 8210, 12290, 16420, 24580, 1009009, 2018018, 4036036, 5045045, 10090090, 20180180]

約数ペア:

[(1, 20180180), (2, 10090090), (4, 5045045), (5, 4036036), (10, 2018018), (20, 1009009), (821, 24580), (1229, 16420), (1642, 12290), (2458, 8210), (3284, 6145), (4105, 4916)]