21010725

素因数分解:

$3^3\times 5^2\times {\mathrm{17}}^1\times {\mathrm{1831}}^1$

素因数の和:1867

約数の個数: 48

約数和(自身を含む): 40890240

約数和(自身を除く): 19879515

約数列:

[1, 3, 5, 9, 15, 17, 25, 27, 45, 51, 75, 85, 135, 153, 225, 255, 425, 459, 675, 765, 1275, 1831, 2295, 3825, 5493, 9155, 11475, 16479, 27465, 31127, 45775, 49437, 82395, 93381, 137325, 155635, 247185, 280143, 411975, 466905, 778175, 840429, 1235925, 1400715, 2334525, 4202145, 7003575, 21010725]

約数ペア:

[(1, 21010725), (3, 7003575), (5, 4202145), (9, 2334525), (15, 1400715), (17, 1235925), (25, 840429), (27, 778175), (45, 466905), (51, 411975), (75, 280143), (85, 247185), (135, 155635), (153, 137325), (225, 93381), (255, 82395), (425, 49437), (459, 45775), (675, 31127), (765, 27465), (1275, 16479), (1831, 11475), (2295, 9155), (3825, 5493)]