20512887760

素因数分解:

$2^4\times 5^1\times {\mathrm{256411097}}^1$

素因数の和:256411110

約数の個数: 20

約数和(自身を含む): 47692464228

約数和(自身を除く): 27179576468

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 256411097, 512822194, 1025644388, 1282055485, 2051288776, 2564110970, 4102577552, 5128221940, 10256443880, 20512887760]

約数ペア:

[(1, 20512887760), (2, 10256443880), (4, 5128221940), (5, 4102577552), (8, 2564110970), (10, 2051288776), (16, 1282055485), (20, 1025644388), (40, 512822194), (80, 256411097)]