21620895

素因数分解:

$3^1\times 5^1\times {\mathrm{131}}^1\times {\mathrm{11003}}^1$

素因数の和:11142

約数の個数: 16

約数和(自身を含む): 34860672

約数和(自身を除く): 13239777

約数列:

[1, 3, 5, 15, 131, 393, 655, 1965, 11003, 33009, 55015, 165045, 1441393, 4324179, 7206965, 21620895]

約数ペア:

[(1, 21620895), (3, 7206965), (5, 4324179), (15, 1441393), (131, 165045), (393, 55015), (655, 33009), (1965, 11003)]