20998605

素因数分解:

$3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{19717}}^1$

素因数の和:19796

約数の個数: 16

約数和(自身を含む): 34072704

約数和(自身を除く): 13074099

約数列:

[1, 3, 5, 15, 71, 213, 355, 1065, 19717, 59151, 98585, 295755, 1399907, 4199721, 6999535, 20998605]

約数ペア:

[(1, 20998605), (3, 6999535), (5, 4199721), (15, 1399907), (71, 295755), (213, 98585), (355, 59151), (1065, 19717)]