20109905

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{331}}^1\times {\mathrm{419}}^1$

素因数の和:784

約数の個数: 16

約数和(自身を含む): 25099200

約数和(自身を除く): 4989295

約数列:

[1, 5, 29, 145, 331, 419, 1655, 2095, 9599, 12151, 47995, 60755, 138689, 693445, 4021981, 20109905]

約数ペア:

[(1, 20109905), (5, 4021981), (29, 693445), (145, 138689), (331, 60755), (419, 47995), (1655, 12151), (2095, 9599)]