21181780

素因数分解:

$2^2\times 5^1\times {\mathrm{281}}^1\times {\mathrm{3769}}^1$

素因数の和:4059

約数の個数: 24

約数和(自身を含む): 44651880

約数和(自身を除く): 23470100

約数列:

[1, 2, 4, 5, 10, 20, 281, 562, 1124, 1405, 2810, 3769, 5620, 7538, 15076, 18845, 37690, 75380, 1059089, 2118178, 4236356, 5295445, 10590890, 21181780]

約数ペア:

[(1, 21181780), (2, 10590890), (4, 5295445), (5, 4236356), (10, 2118178), (20, 1059089), (281, 75380), (562, 37690), (1124, 18845), (1405, 15076), (2810, 7538), (3769, 5620)]