20155550

素因数分解:

$2^1\times 5^2\times {\mathrm{491}}^1\times {\mathrm{821}}^1$

素因数の和:1324

約数の個数: 24

約数和(自身を含む): 37611432

約数和(自身を除く): 17455882

約数列:

[1, 2, 5, 10, 25, 50, 491, 821, 982, 1642, 2455, 4105, 4910, 8210, 12275, 20525, 24550, 41050, 403111, 806222, 2015555, 4031110, 10077775, 20155550]

約数ペア:

[(1, 20155550), (2, 10077775), (5, 4031110), (10, 2015555), (25, 806222), (50, 403111), (491, 41050), (821, 24550), (982, 20525), (1642, 12275), (2455, 8210), (4105, 4910)]