21356505

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{27917}}^1$

素因数の和:27945

約数の個数: 24

約数和(自身を含む): 39196872

約数和(自身を除く): 17840367

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 765, 27917, 83751, 139585, 251253, 418755, 474589, 1256265, 1423767, 2372945, 4271301, 7118835, 21356505]

約数ペア:

[(1, 21356505), (3, 7118835), (5, 4271301), (9, 2372945), (15, 1423767), (17, 1256265), (45, 474589), (51, 418755), (85, 251253), (153, 139585), (255, 83751), (765, 27917)]