19720605

素因数分解:

$3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{18517}}^1$

素因数の和:18596

約数の個数: 16

約数和(自身を含む): 31999104

約数和(自身を除く): 12278499

約数列:

[1, 3, 5, 15, 71, 213, 355, 1065, 18517, 55551, 92585, 277755, 1314707, 3944121, 6573535, 19720605]

約数ペア:

[(1, 19720605), (3, 6573535), (5, 3944121), (15, 1314707), (71, 277755), (213, 92585), (355, 55551), (1065, 18517)]