812620

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{991}}^1$

素因数の和:1041

約数の個数: 24

約数和(自身を含む): 1749888

約数和(自身を除く): 937268

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 991, 1982, 3964, 4955, 9910, 19820, 40631, 81262, 162524, 203155, 406310, 812620]

約数ペア:

[(1, 812620), (2, 406310), (4, 203155), (5, 162524), (10, 81262), (20, 40631), (41, 19820), (82, 9910), (164, 4955), (205, 3964), (410, 1982), (820, 991)]