20089705

素因数分解:

$5^1\times {\mathrm{31}}^2\times {\mathrm{37}}^1\times {\mathrm{113}}^1$

素因数の和:217

約数の個数: 24

約数和(自身を含む): 25810056

約数和(自身を除く): 5720351

約数列:

[1, 5, 31, 37, 113, 155, 185, 565, 961, 1147, 3503, 4181, 4805, 5735, 17515, 20905, 35557, 108593, 129611, 177785, 542965, 648055, 4017941, 20089705]

約数ペア:

[(1, 20089705), (5, 4017941), (31, 648055), (37, 542965), (113, 177785), (155, 129611), (185, 108593), (565, 35557), (961, 20905), (1147, 17515), (3503, 5735), (4181, 4805)]