20780018

素因数分解:

$2^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{12473}}^1$

素因数の和:12506

約数の個数: 24

約数和(自身を含む): 38394972

約数和(自身を除く): 17614954

約数列:

[1, 2, 7, 14, 17, 34, 49, 98, 119, 238, 833, 1666, 12473, 24946, 87311, 174622, 212041, 424082, 611177, 1222354, 1484287, 2968574, 10390009, 20780018]

約数ペア:

[(1, 20780018), (2, 10390009), (7, 2968574), (14, 1484287), (17, 1222354), (34, 611177), (49, 424082), (98, 212041), (119, 174622), (238, 87311), (833, 24946), (1666, 12473)]