18421985

素因数分解:

$5^1\times {\mathrm{67}}^1\times {\mathrm{127}}^1\times {\mathrm{433}}^1$

素因数の和:632

約数の個数: 16

約数和(自身を含む): 22665216

約数和(自身を除く): 4243231

約数列:

[1, 5, 67, 127, 335, 433, 635, 2165, 8509, 29011, 42545, 54991, 145055, 274955, 3684397, 18421985]

約数ペア:

[(1, 18421985), (5, 3684397), (67, 274955), (127, 145055), (335, 54991), (433, 42545), (635, 29011), (2165, 8509)]