20506905

素因数分解:

$3^3\times 5^1\times {\mathrm{151903}}^1$

素因数の和:151917

約数の個数: 16

約数和(自身を含む): 36456960

約数和(自身を除く): 15950055

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 151903, 455709, 759515, 1367127, 2278545, 4101381, 6835635, 20506905]

約数ペア:

[(1, 20506905), (3, 6835635), (5, 4101381), (9, 2278545), (15, 1367127), (27, 759515), (45, 455709), (135, 151903)]