21985940

素因数分解:

$2^2\times 5^1\times {\mathrm{499}}^1\times {\mathrm{2203}}^1$

素因数の和:2711

約数の個数: 24

約数和(自身を含む): 46284000

約数和(自身を除く): 24298060

約数列:

[1, 2, 4, 5, 10, 20, 499, 998, 1996, 2203, 2495, 4406, 4990, 8812, 9980, 11015, 22030, 44060, 1099297, 2198594, 4397188, 5496485, 10992970, 21985940]

約数ペア:

[(1, 21985940), (2, 10992970), (4, 5496485), (5, 4397188), (10, 2198594), (20, 1099297), (499, 44060), (998, 22030), (1996, 11015), (2203, 9980), (2495, 8812), (4406, 4990)]