19742495

素因数分解:

$5^1\times {\mathrm{79}}^1\times {\mathrm{151}}^1\times {\mathrm{331}}^1$

素因数の和:566

約数の個数: 16

約数和(自身を含む): 24222720

約数和(自身を除く): 4480225

約数列:

[1, 5, 79, 151, 331, 395, 755, 1655, 11929, 26149, 49981, 59645, 130745, 249905, 3948499, 19742495]

約数ペア:

[(1, 19742495), (5, 3948499), (79, 249905), (151, 130745), (331, 59645), (395, 49981), (755, 26149), (1655, 11929)]