21816580

素因数分解:

$2^2\times 5^1\times {\mathrm{149}}^1\times {\mathrm{7321}}^1$

素因数の和:7479

約数の個数: 24

約数和(自身を含む): 46128600

約数和(自身を除く): 24312020

約数列:

[1, 2, 4, 5, 10, 20, 149, 298, 596, 745, 1490, 2980, 7321, 14642, 29284, 36605, 73210, 146420, 1090829, 2181658, 4363316, 5454145, 10908290, 21816580]

約数ペア:

[(1, 21816580), (2, 10908290), (4, 5454145), (5, 4363316), (10, 2181658), (20, 1090829), (149, 146420), (298, 73210), (596, 36605), (745, 29284), (1490, 14642), (2980, 7321)]