21225605

素因数分解:

$5^1\times {\mathrm{17}}^2\times {\mathrm{37}}^1\times {\mathrm{397}}^1$

素因数の和:473

約数の個数: 24

約数和(自身を含む): 27858408

約数和(自身を除く): 6632803

約数列:

[1, 5, 17, 37, 85, 185, 289, 397, 629, 1445, 1985, 3145, 6749, 10693, 14689, 33745, 53465, 73445, 114733, 249713, 573665, 1248565, 4245121, 21225605]

約数ペア:

[(1, 21225605), (5, 4245121), (17, 1248565), (37, 573665), (85, 249713), (185, 114733), (289, 73445), (397, 53465), (629, 33745), (1445, 14689), (1985, 10693), (3145, 6749)]