20987565

素因数分解:

$3^1\times 5^1\times {\mathrm{569}}^1\times {\mathrm{2459}}^1$

素因数の和:3036

約数の個数: 16

約数和(自身を含む): 33652800

約数和(自身を除く): 12665235

約数列:

[1, 3, 5, 15, 569, 1707, 2459, 2845, 7377, 8535, 12295, 36885, 1399171, 4197513, 6995855, 20987565]

約数ペア:

[(1, 20987565), (3, 6995855), (5, 4197513), (15, 1399171), (569, 36885), (1707, 12295), (2459, 8535), (2845, 7377)]