28040225

素因数分解:

$5^2\times {\mathrm{17}}^2\times {\mathrm{3881}}^1$

素因数の和:3925

約数の個数: 18

約数和(自身を含む): 36944994

約数和(自身を除く): 8904769

約数列:

[1, 5, 17, 25, 85, 289, 425, 1445, 3881, 7225, 19405, 65977, 97025, 329885, 1121609, 1649425, 5608045, 28040225]

約数ペア:

[(1, 28040225), (5, 5608045), (17, 1649425), (25, 1121609), (85, 329885), (289, 97025), (425, 65977), (1445, 19405), (3881, 7225)]