21140440

素因数分解:

$2^3\times 5^1\times {\mathrm{528511}}^1$

素因数の和:528522

約数の個数: 16

約数和(自身を含む): 47566080

約数和(自身を除く): 26425640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 528511, 1057022, 2114044, 2642555, 4228088, 5285110, 10570220, 21140440]

約数ペア:

[(1, 21140440), (2, 10570220), (4, 5285110), (5, 4228088), (8, 2642555), (10, 2114044), (20, 1057022), (40, 528511)]