21122890

素因数分解:

$2^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{49123}}^1$

素因数の和:49173

約数の個数: 16

約数和(自身を含む): 38906208

約数和(自身を除く): 17783318

約数列:

[1, 2, 5, 10, 43, 86, 215, 430, 49123, 98246, 245615, 491230, 2112289, 4224578, 10561445, 21122890]

約数ペア:

[(1, 21122890), (2, 10561445), (5, 4224578), (10, 2112289), (43, 491230), (86, 245615), (215, 98246), (430, 49123)]