21378160

素因数分解:

$2^4\times 5^1\times {\mathrm{267227}}^1$

素因数の和:267240

約数の個数: 20

約数和(自身を含む): 49704408

約数和(自身を除く): 28326248

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 267227, 534454, 1068908, 1336135, 2137816, 2672270, 4275632, 5344540, 10689080, 21378160]

約数ペア:

[(1, 21378160), (2, 10689080), (4, 5344540), (5, 4275632), (8, 2672270), (10, 2137816), (16, 1336135), (20, 1068908), (40, 534454), (80, 267227)]