21432080

素因数分解:

$2^4\times 5^1\times {\mathrm{267901}}^1$

素因数の和:267914

約数の個数: 20

約数和(自身を含む): 49829772

約数和(自身を除く): 28397692

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 267901, 535802, 1071604, 1339505, 2143208, 2679010, 4286416, 5358020, 10716040, 21432080]

約数ペア:

[(1, 21432080), (2, 10716040), (4, 5358020), (5, 4286416), (8, 2679010), (10, 2143208), (16, 1339505), (20, 1071604), (40, 535802), (80, 267901)]