20891385

素因数分解:

$3^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{9103}}^1$

素因数の和:9134

約数の個数: 32

約数和(自身を含む): 39329280

約数和(自身を除く): 18437895

約数列:

[1, 3, 5, 9, 15, 17, 27, 45, 51, 85, 135, 153, 255, 459, 765, 2295, 9103, 27309, 45515, 81927, 136545, 154751, 245781, 409635, 464253, 773755, 1228905, 1392759, 2321265, 4178277, 6963795, 20891385]

約数ペア:

[(1, 20891385), (3, 6963795), (5, 4178277), (9, 2321265), (15, 1392759), (17, 1228905), (27, 773755), (45, 464253), (51, 409635), (85, 245781), (135, 154751), (153, 136545), (255, 81927), (459, 45515), (765, 27309), (2295, 9103)]