21631905

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{28277}}^1$

素因数の和:28305

約数の個数: 24

約数和(自身を含む): 39702312

約数和(自身を除く): 18070407

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 765, 28277, 84831, 141385, 254493, 424155, 480709, 1272465, 1442127, 2403545, 4326381, 7210635, 21631905]

約数ペア:

[(1, 21631905), (3, 7210635), (5, 4326381), (9, 2403545), (15, 1442127), (17, 1272465), (45, 480709), (51, 424155), (85, 254493), (153, 141385), (255, 84831), (765, 28277)]