21798675

素因数分解:

$3^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{139}}^1$

素因数の和:213

約数の個数: 72

約数和(自身を含む): 42653520

約数和(自身を除く): 20854845

約数列:

[1, 3, 5, 9, 15, 17, 25, 41, 45, 51, 75, 85, 123, 139, 153, 205, 225, 255, 369, 417, 425, 615, 695, 697, 765, 1025, 1251, 1275, 1845, 2085, 2091, 2363, 3075, 3475, 3485, 3825, 5699, 6255, 6273, 7089, 9225, 10425, 10455, 11815, 17097, 17425, 21267, 28495, 31275, 31365, 35445, 51291, 52275, 59075, 85485, 96883, 106335, 142475, 156825, 177225, 256455, 290649, 427425, 484415, 531675, 871947, 1282275, 1453245, 2422075, 4359735, 7266225, 21798675]

約数ペア:

[(1, 21798675), (3, 7266225), (5, 4359735), (9, 2422075), (15, 1453245), (17, 1282275), (25, 871947), (41, 531675), (45, 484415), (51, 427425), (75, 290649), (85, 256455), (123, 177225), (139, 156825), (153, 142475), (205, 106335), (225, 96883), (255, 85485), (369, 59075), (417, 52275), (425, 51291), (615, 35445), (695, 31365), (697, 31275), (765, 28495), (1025, 21267), (1251, 17425), (1275, 17097), (1845, 11815), (2085, 10455), (2091, 10425), (2363, 9225), (3075, 7089), (3475, 6273), (3485, 6255), (3825, 5699)]