156720220

素因数分解:

$2^2\times 5^1\times {\mathrm{431}}^1\times {\mathrm{18181}}^1$

素因数の和:18621

約数の個数: 24

約数和(自身を含む): 329894208

約数和(自身を除く): 173173988

約数列:

[1, 2, 4, 5, 10, 20, 431, 862, 1724, 2155, 4310, 8620, 18181, 36362, 72724, 90905, 181810, 363620, 7836011, 15672022, 31344044, 39180055, 78360110, 156720220]

約数ペア:

[(1, 156720220), (2, 78360110), (4, 39180055), (5, 31344044), (10, 15672022), (20, 7836011), (431, 363620), (862, 181810), (1724, 90905), (2155, 72724), (4310, 36362), (8620, 18181)]