21905775

素因数分解:

$3^3\times 5^2\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{83}}^1$

素因数の和:142

約数の個数: 96

約数和(自身を含む): 44997120

約数和(自身を除く): 23091345

約数列:

[1, 3, 5, 9, 15, 17, 23, 25, 27, 45, 51, 69, 75, 83, 85, 115, 135, 153, 207, 225, 249, 255, 345, 391, 415, 425, 459, 575, 621, 675, 747, 765, 1035, 1173, 1245, 1275, 1411, 1725, 1909, 1955, 2075, 2241, 2295, 3105, 3519, 3735, 3825, 4233, 5175, 5727, 5865, 6225, 7055, 9545, 9775, 10557, 11205, 11475, 12699, 15525, 17181, 17595, 18675, 21165, 28635, 29325, 32453, 35275, 38097, 47725, 51543, 52785, 56025, 63495, 85905, 87975, 97359, 105825, 143175, 162265, 190485, 257715, 263925, 292077, 317475, 429525, 486795, 811325, 876231, 952425, 1288575, 1460385, 2433975, 4381155, 7301925, 21905775]

約数ペア:

[(1, 21905775), (3, 7301925), (5, 4381155), (9, 2433975), (15, 1460385), (17, 1288575), (23, 952425), (25, 876231), (27, 811325), (45, 486795), (51, 429525), (69, 317475), (75, 292077), (83, 263925), (85, 257715), (115, 190485), (135, 162265), (153, 143175), (207, 105825), (225, 97359), (249, 87975), (255, 85905), (345, 63495), (391, 56025), (415, 52785), (425, 51543), (459, 47725), (575, 38097), (621, 35275), (675, 32453), (747, 29325), (765, 28635), (1035, 21165), (1173, 18675), (1245, 17595), (1275, 17181), (1411, 15525), (1725, 12699), (1909, 11475), (1955, 11205), (2075, 10557), (2241, 9775), (2295, 9545), (3105, 7055), (3519, 6225), (3735, 5865), (3825, 5727), (4233, 5175)]