20215780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{5981}}^1$

素因数の和:6016

約数の個数: 36

約数和(自身を含む): 45977652

約数和(自身を除く): 25761872

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 169, 260, 338, 676, 845, 1690, 3380, 5981, 11962, 23924, 29905, 59810, 77753, 119620, 155506, 311012, 388765, 777530, 1010789, 1555060, 2021578, 4043156, 5053945, 10107890, 20215780]

約数ペア:

[(1, 20215780), (2, 10107890), (4, 5053945), (5, 4043156), (10, 2021578), (13, 1555060), (20, 1010789), (26, 777530), (52, 388765), (65, 311012), (130, 155506), (169, 119620), (260, 77753), (338, 59810), (676, 29905), (845, 23924), (1690, 11962), (3380, 5981)]