21581008

素因数分解:

$2^4\times {\mathrm{353}}^1\times {\mathrm{3821}}^1$

素因数の和:4182

約数の個数: 20

約数和(自身を含む): 41942628

約数和(自身を除く): 20361620

約数列:

[1, 2, 4, 8, 16, 353, 706, 1412, 2824, 3821, 5648, 7642, 15284, 30568, 61136, 1348813, 2697626, 5395252, 10790504, 21581008]

約数ペア:

[(1, 21581008), (2, 10790504), (4, 5395252), (8, 2697626), (16, 1348813), (353, 61136), (706, 30568), (1412, 15284), (2824, 7642), (3821, 5648)]