18166904

素因数分解:

$2^3\times 7^1\times {\mathrm{401}}^1\times {\mathrm{809}}^1$

素因数の和:1223

約数の個数: 32

約数和(自身を含む): 39074400

約数和(自身を除く): 20907496

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 401, 802, 809, 1604, 1618, 2807, 3208, 3236, 5614, 5663, 6472, 11228, 11326, 22456, 22652, 45304, 324409, 648818, 1297636, 2270863, 2595272, 4541726, 9083452, 18166904]

約数ペア:

[(1, 18166904), (2, 9083452), (4, 4541726), (7, 2595272), (8, 2270863), (14, 1297636), (28, 648818), (56, 324409), (401, 45304), (802, 22652), (809, 22456), (1604, 11326), (1618, 11228), (2807, 6472), (3208, 5663), (3236, 5614)]