21336860

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{11987}}^1$

素因数の和:12085

約数の個数: 24

約数和(自身を含む): 45314640

約数和(自身を除く): 23977780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 11987, 23974, 47948, 59935, 119870, 239740, 1066843, 2133686, 4267372, 5334215, 10668430, 21336860]

約数ペア:

[(1, 21336860), (2, 10668430), (4, 5334215), (5, 4267372), (10, 2133686), (20, 1066843), (89, 239740), (178, 119870), (356, 59935), (445, 47948), (890, 23974), (1780, 11987)]