217581985

素因数分解:

$5^1\times {\mathrm{71}}^1\times {\mathrm{109}}^1\times {\mathrm{5623}}^1$

素因数の和:5808

約数の個数: 16

約数和(自身を含む): 267252480

約数和(自身を除く): 49670495

約数列:

[1, 5, 71, 109, 355, 545, 5623, 7739, 28115, 38695, 399233, 612907, 1996165, 3064535, 43516397, 217581985]

約数ペア:

[(1, 217581985), (5, 43516397), (71, 3064535), (109, 1996165), (355, 612907), (545, 399233), (5623, 38695), (7739, 28115)]