21765740

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{25309}}^1$

素因数の和:25361

約数の個数: 24

約数和(自身を含む): 46772880

約数和(自身を除く): 25007140

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 25309, 50618, 101236, 126545, 253090, 506180, 1088287, 2176574, 4353148, 5441435, 10882870, 21765740]

約数ペア:

[(1, 21765740), (2, 10882870), (4, 5441435), (5, 4353148), (10, 2176574), (20, 1088287), (43, 506180), (86, 253090), (172, 126545), (215, 101236), (430, 50618), (860, 25309)]