28258820

素因数分解:

$2^2\times 5^1\times {\mathrm{821}}^1\times {\mathrm{1721}}^1$

素因数の和:2551

約数の個数: 24

約数和(自身を含む): 59450328

約数和(自身を除く): 31191508

約数列:

[1, 2, 4, 5, 10, 20, 821, 1642, 1721, 3284, 3442, 4105, 6884, 8210, 8605, 16420, 17210, 34420, 1412941, 2825882, 5651764, 7064705, 14129410, 28258820]

約数ペア:

[(1, 28258820), (2, 14129410), (4, 7064705), (5, 5651764), (10, 2825882), (20, 1412941), (821, 34420), (1642, 17210), (1721, 16420), (3284, 8605), (3442, 8210), (4105, 6884)]