21196180

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{25849}}^1$

素因数の和:25899

約数の個数: 24

約数和(自身を含む): 45599400

約数和(自身を除く): 24403220

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 25849, 51698, 103396, 129245, 258490, 516980, 1059809, 2119618, 4239236, 5299045, 10598090, 21196180]

約数ペア:

[(1, 21196180), (2, 10598090), (4, 5299045), (5, 4239236), (10, 2119618), (20, 1059809), (41, 516980), (82, 258490), (164, 129245), (205, 103396), (410, 51698), (820, 25849)]