20487465

素因数分解:

$3^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{113}}^1$

素因数の和:223

約数の個数: 64

約数和(自身を含む): 39398400

約数和(自身を除く): 18910935

約数列:

[1, 3, 5, 9, 15, 17, 27, 45, 51, 79, 85, 113, 135, 153, 237, 255, 339, 395, 459, 565, 711, 765, 1017, 1185, 1343, 1695, 1921, 2133, 2295, 3051, 3555, 4029, 5085, 5763, 6715, 8927, 9605, 10665, 12087, 15255, 17289, 20145, 26781, 28815, 36261, 44635, 51867, 60435, 80343, 86445, 133905, 151759, 181305, 241029, 259335, 401715, 455277, 758795, 1205145, 1365831, 2276385, 4097493, 6829155, 20487465]

約数ペア:

[(1, 20487465), (3, 6829155), (5, 4097493), (9, 2276385), (15, 1365831), (17, 1205145), (27, 758795), (45, 455277), (51, 401715), (79, 259335), (85, 241029), (113, 181305), (135, 151759), (153, 133905), (237, 86445), (255, 80343), (339, 60435), (395, 51867), (459, 44635), (565, 36261), (711, 28815), (765, 26781), (1017, 20145), (1185, 17289), (1343, 15255), (1695, 12087), (1921, 10665), (2133, 9605), (2295, 8927), (3051, 6715), (3555, 5763), (4029, 5085)]