18917829

素因数分解:

$3^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{6389}}^1$

素因数の和:6449

約数の個数: 24

約数和(自身を含む): 31898880

約数和(自身を除く): 12981051

約数列:

[1, 3, 7, 9, 21, 47, 63, 141, 329, 423, 987, 2961, 6389, 19167, 44723, 57501, 134169, 300283, 402507, 900849, 2101981, 2702547, 6305943, 18917829]

約数ペア:

[(1, 18917829), (3, 6305943), (7, 2702547), (9, 2101981), (21, 900849), (47, 402507), (63, 300283), (141, 134169), (329, 57501), (423, 44723), (987, 19167), (2961, 6389)]