18211816

素因数分解:

$2^3\times 7^1\times {\mathrm{401}}^1\times {\mathrm{811}}^1$

素因数の和:1225

約数の個数: 32

約数和(自身を含む): 39170880

約数和(自身を除く): 20959064

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 401, 802, 811, 1604, 1622, 2807, 3208, 3244, 5614, 5677, 6488, 11228, 11354, 22456, 22708, 45416, 325211, 650422, 1300844, 2276477, 2601688, 4552954, 9105908, 18211816]

約数ペア:

[(1, 18211816), (2, 9105908), (4, 4552954), (7, 2601688), (8, 2276477), (14, 1300844), (28, 650422), (56, 325211), (401, 45416), (802, 22708), (811, 22456), (1604, 11354), (1622, 11228), (2807, 6488), (3208, 5677), (3244, 5614)]