20999505

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{82351}}^1$

素因数の和:82376

約数の個数: 16

約数和(自身を含む): 35576064

約数和(自身を除く): 14576559

約数列:

[1, 3, 5, 15, 17, 51, 85, 255, 82351, 247053, 411755, 1235265, 1399967, 4199901, 6999835, 20999505]

約数ペア:

[(1, 20999505), (3, 6999835), (5, 4199901), (15, 1399967), (17, 1235265), (51, 411755), (85, 247053), (255, 82351)]