20891292

素因数分解:

$2^2\times 3^1\times {\mathrm{43}}^1\times {\mathrm{40487}}^1$

素因数の和:40537

約数の個数: 24

約数和(自身を含む): 49881216

約数和(自身を除く): 28989924

約数列:

[1, 2, 3, 4, 6, 12, 43, 86, 129, 172, 258, 516, 40487, 80974, 121461, 161948, 242922, 485844, 1740941, 3481882, 5222823, 6963764, 10445646, 20891292]

約数ペア:

[(1, 20891292), (2, 10445646), (3, 6963764), (4, 5222823), (6, 3481882), (12, 1740941), (43, 485844), (86, 242922), (129, 161948), (172, 121461), (258, 80974), (516, 40487)]