217620820

素因数分解:

$2^2\times 5^1\times {\mathrm{487}}^1\times {\mathrm{22343}}^1$

素因数の和:22839

約数の個数: 24

約数和(自身を含む): 457962624

約数和(自身を除く): 240341804

約数列:

[1, 2, 4, 5, 10, 20, 487, 974, 1948, 2435, 4870, 9740, 22343, 44686, 89372, 111715, 223430, 446860, 10881041, 21762082, 43524164, 54405205, 108810410, 217620820]

約数ペア:

[(1, 217620820), (2, 108810410), (4, 54405205), (5, 43524164), (10, 21762082), (20, 10881041), (487, 446860), (974, 223430), (1948, 111715), (2435, 89372), (4870, 44686), (9740, 22343)]