21244540

素因数分解:

$2^2\times 5^1\times {\mathrm{661}}^1\times {\mathrm{1607}}^1$

素因数の和:2277

約数の個数: 24

約数和(自身を含む): 44708832

約数和(自身を除く): 23464292

約数列:

[1, 2, 4, 5, 10, 20, 661, 1322, 1607, 2644, 3214, 3305, 6428, 6610, 8035, 13220, 16070, 32140, 1062227, 2124454, 4248908, 5311135, 10622270, 21244540]

約数ペア:

[(1, 21244540), (2, 10622270), (4, 5311135), (5, 4248908), (10, 2124454), (20, 1062227), (661, 32140), (1322, 16070), (1607, 13220), (2644, 8035), (3214, 6610), (3305, 6428)]