20561265

素因数分解:

$3^2\times 5^1\times {\mathrm{521}}^1\times {\mathrm{877}}^1$

素因数の和:1409

約数の個数: 24

約数和(自身を含む): 35748648

約数和(自身を除く): 15187383

約数列:

[1, 3, 5, 9, 15, 45, 521, 877, 1563, 2605, 2631, 4385, 4689, 7815, 7893, 13155, 23445, 39465, 456917, 1370751, 2284585, 4112253, 6853755, 20561265]

約数ペア:

[(1, 20561265), (3, 6853755), (5, 4112253), (9, 2284585), (15, 1370751), (45, 456917), (521, 39465), (877, 23445), (1563, 13155), (2605, 7893), (2631, 7815), (4385, 4689)]