81420905

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{25889}}^1$

素因数の和:25948

約数の個数: 16

約数和(自身を含む): 106252560

約数和(自身を除く): 24831655

約数列:

[1, 5, 17, 37, 85, 185, 629, 3145, 25889, 129445, 440113, 957893, 2200565, 4789465, 16284181, 81420905]

約数ペア:

[(1, 81420905), (5, 16284181), (17, 4789465), (37, 2200565), (85, 957893), (185, 440113), (629, 129445), (3145, 25889)]