20391664

素因数分解:

$2^4\times {\mathrm{487}}^1\times {\mathrm{2617}}^1$

素因数の和:3112

約数の個数: 20

約数和(自身を含む): 39605104

約数和(自身を除く): 19213440

約数列:

[1, 2, 4, 8, 16, 487, 974, 1948, 2617, 3896, 5234, 7792, 10468, 20936, 41872, 1274479, 2548958, 5097916, 10195832, 20391664]

約数ペア:

[(1, 20391664), (2, 10195832), (4, 5097916), (8, 2548958), (16, 1274479), (487, 41872), (974, 20936), (1948, 10468), (2617, 7792), (3896, 5234)]