638642018

素因数分解:

$2^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{193}}^1\times {\mathrm{3329}}^1$

素因数の和:3602

約数の個数: 32

約数和(自身を含む): 1116322560

約数和(自身を除く): 477680542

約数列:

[1, 2, 7, 14, 71, 142, 193, 386, 497, 994, 1351, 2702, 3329, 6658, 13703, 23303, 27406, 46606, 95921, 191842, 236359, 472718, 642497, 1284994, 1654513, 3309026, 4497479, 8994958, 45617287, 91234574, 319321009, 638642018]

約数ペア:

[(1, 638642018), (2, 319321009), (7, 91234574), (14, 45617287), (71, 8994958), (142, 4497479), (193, 3309026), (386, 1654513), (497, 1284994), (994, 642497), (1351, 472718), (2702, 236359), (3329, 191842), (6658, 95921), (13703, 46606), (23303, 27406)]