21430960

素因数分解:

$2^4\times 5^1\times {\mathrm{267887}}^1$

素因数の和:267900

約数の個数: 20

約数和(自身を含む): 49827168

約数和(自身を除く): 28396208

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 267887, 535774, 1071548, 1339435, 2143096, 2678870, 4286192, 5357740, 10715480, 21430960]

約数ペア:

[(1, 21430960), (2, 10715480), (4, 5357740), (5, 4286192), (8, 2678870), (10, 2143096), (16, 1339435), (20, 1071548), (40, 535774), (80, 267887)]