20857905

素因数分解:

$3^5\times 5^1\times {\mathrm{17167}}^1$

素因数の和:17187

約数の個数: 24

約数和(自身を含む): 37494912

約数和(自身を除く): 16637007

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 1215, 17167, 51501, 85835, 154503, 257505, 463509, 772515, 1390527, 2317545, 4171581, 6952635, 20857905]

約数ペア:

[(1, 20857905), (3, 6952635), (5, 4171581), (9, 2317545), (15, 1390527), (27, 772515), (45, 463509), (81, 257505), (135, 154503), (243, 85835), (405, 51501), (1215, 17167)]