21765290

素因数分解:

$2^1\times 5^1\times {\mathrm{79}}^1\times {\mathrm{27551}}^1$

素因数の和:27637

約数の個数: 16

約数和(自身を含む): 39674880

約数和(自身を除く): 17909590

約数列:

[1, 2, 5, 10, 79, 158, 395, 790, 27551, 55102, 137755, 275510, 2176529, 4353058, 10882645, 21765290]

約数ペア:

[(1, 21765290), (2, 10882645), (5, 4353058), (10, 2176529), (79, 275510), (158, 137755), (395, 55102), (790, 27551)]