18721684

素因数分解:

$2^2\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{1223}}^1$

素因数の和:1359

約数の個数: 24

約数和(自身を含む): 33929280

約数和(自身を除く): 15207596

約数列:

[1, 2, 4, 43, 86, 89, 172, 178, 356, 1223, 2446, 3827, 4892, 7654, 15308, 52589, 105178, 108847, 210356, 217694, 435388, 4680421, 9360842, 18721684]

約数ペア:

[(1, 18721684), (2, 9360842), (4, 4680421), (43, 435388), (86, 217694), (89, 210356), (172, 108847), (178, 105178), (356, 52589), (1223, 15308), (2446, 7654), (3827, 4892)]