18888025

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{653}}^1$

素因数の和:765

約数の個数: 24

約数和(自身を含む): 25545240

約数和(自身を除く): 6657215

約数列:

[1, 5, 13, 25, 65, 89, 325, 445, 653, 1157, 2225, 3265, 5785, 8489, 16325, 28925, 42445, 58117, 212225, 290585, 755521, 1452925, 3777605, 18888025]

約数ペア:

[(1, 18888025), (5, 3777605), (13, 1452925), (25, 755521), (65, 290585), (89, 212225), (325, 58117), (445, 42445), (653, 28925), (1157, 16325), (2225, 8489), (3265, 5785)]