817540

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{997}}^1$

素因数の和:1047

約数の個数: 24

約数和(自身を含む): 1760472

約数和(自身を除く): 942932

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 997, 1994, 3988, 4985, 9970, 19940, 40877, 81754, 163508, 204385, 408770, 817540]

約数ペア:

[(1, 817540), (2, 408770), (4, 204385), (5, 163508), (10, 81754), (20, 40877), (41, 19940), (82, 9970), (164, 4985), (205, 3988), (410, 1994), (820, 997)]