51990160

素因数分解:

$2^4\times 5^1\times {\mathrm{649877}}^1$

素因数の和:649890

約数の個数: 20

約数和(自身を含む): 120877308

約数和(自身を除く): 68887148

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 649877, 1299754, 2599508, 3249385, 5199016, 6498770, 10398032, 12997540, 25995080, 51990160]

約数ペア:

[(1, 51990160), (2, 25995080), (4, 12997540), (5, 10398032), (8, 6498770), (10, 5199016), (16, 3249385), (20, 2599508), (40, 1299754), (80, 649877)]