20689724

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{431}}^1\times {\mathrm{1091}}^1$

素因数の和:1537

約数の個数: 24

約数和(自身を含む): 39626496

約数和(自身を除く): 18936772

約数列:

[1, 2, 4, 11, 22, 44, 431, 862, 1091, 1724, 2182, 4364, 4741, 9482, 12001, 18964, 24002, 48004, 470221, 940442, 1880884, 5172431, 10344862, 20689724]

約数ペア:

[(1, 20689724), (2, 10344862), (4, 5172431), (11, 1880884), (22, 940442), (44, 470221), (431, 48004), (862, 24002), (1091, 18964), (1724, 12001), (2182, 9482), (4364, 4741)]