20647510

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{2237}}^1$

素因数の和:2328

約数の個数: 32

約数和(自身を含む): 40606272

約数和(自身を除く): 19958762

約数列:

[1, 2, 5, 10, 13, 26, 65, 71, 130, 142, 355, 710, 923, 1846, 2237, 4474, 4615, 9230, 11185, 22370, 29081, 58162, 145405, 158827, 290810, 317654, 794135, 1588270, 2064751, 4129502, 10323755, 20647510]

約数ペア:

[(1, 20647510), (2, 10323755), (5, 4129502), (10, 2064751), (13, 1588270), (26, 794135), (65, 317654), (71, 290810), (130, 158827), (142, 145405), (355, 58162), (710, 29081), (923, 22370), (1846, 11185), (2237, 9230), (4474, 4615)]