31485640

素因数分解:

$2^3\times 5^1\times {\mathrm{311}}^1\times {\mathrm{2531}}^1$

素因数の和:2853

約数の個数: 32

約数和(自身を含む): 71098560

約数和(自身を除く): 39612920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 311, 622, 1244, 1555, 2488, 2531, 3110, 5062, 6220, 10124, 12440, 12655, 20248, 25310, 50620, 101240, 787141, 1574282, 3148564, 3935705, 6297128, 7871410, 15742820, 31485640]

約数ペア:

[(1, 31485640), (2, 15742820), (4, 7871410), (5, 6297128), (8, 3935705), (10, 3148564), (20, 1574282), (40, 787141), (311, 101240), (622, 50620), (1244, 25310), (1555, 20248), (2488, 12655), (2531, 12440), (3110, 10124), (5062, 6220)]