21460138

素因数分解:

$2^1\times 7^4\times {\mathrm{41}}^1\times {\mathrm{109}}^1$

素因数の和:180

約数の個数: 40

約数和(自身を含む): 38821860

約数和(自身を除く): 17361722

約数列:

[1, 2, 7, 14, 41, 49, 82, 98, 109, 218, 287, 343, 574, 686, 763, 1526, 2009, 2401, 4018, 4469, 4802, 5341, 8938, 10682, 14063, 28126, 31283, 37387, 62566, 74774, 98441, 196882, 218981, 261709, 437962, 523418, 1532867, 3065734, 10730069, 21460138]

約数ペア:

[(1, 21460138), (2, 10730069), (7, 3065734), (14, 1532867), (41, 523418), (49, 437962), (82, 261709), (98, 218981), (109, 196882), (218, 98441), (287, 74774), (343, 62566), (574, 37387), (686, 31283), (763, 28126), (1526, 14063), (2009, 10682), (2401, 8938), (4018, 5341), (4469, 4802)]