20445640

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{11887}}^1$

素因数の和:11941

約数の個数: 32

約数和(自身を含む): 47076480

約数和(自身を除く): 26630840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 11887, 23774, 47548, 59435, 95096, 118870, 237740, 475480, 511141, 1022282, 2044564, 2555705, 4089128, 5111410, 10222820, 20445640]

約数ペア:

[(1, 20445640), (2, 10222820), (4, 5111410), (5, 4089128), (8, 2555705), (10, 2044564), (20, 1022282), (40, 511141), (43, 475480), (86, 237740), (172, 118870), (215, 95096), (344, 59435), (430, 47548), (860, 23774), (1720, 11887)]