217881580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{1556297}}^1$

素因数の和:1556313

約数の個数: 24

約数和(自身を含む): 522916128

約数和(自身を除く): 305034548

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 1556297, 3112594, 6225188, 7781485, 10894079, 15562970, 21788158, 31125940, 43576316, 54470395, 108940790, 217881580]

約数ペア:

[(1, 217881580), (2, 108940790), (4, 54470395), (5, 43576316), (7, 31125940), (10, 21788158), (14, 15562970), (20, 10894079), (28, 7781485), (35, 6225188), (70, 3112594), (140, 1556297)]