21244420

素因数分解:

$2^2\times 5^1\times {\mathrm{149}}^1\times {\mathrm{7129}}^1$

素因数の和:7287

約数の個数: 24

約数和(自身を含む): 44919000

約数和(自身を除く): 23674580

約数列:

[1, 2, 4, 5, 10, 20, 149, 298, 596, 745, 1490, 2980, 7129, 14258, 28516, 35645, 71290, 142580, 1062221, 2124442, 4248884, 5311105, 10622210, 21244420]

約数ペア:

[(1, 21244420), (2, 10622210), (4, 5311105), (5, 4248884), (10, 2124442), (20, 1062221), (149, 142580), (298, 71290), (596, 35645), (745, 28516), (1490, 14258), (2980, 7129)]