21808875

素因数分解:

$3^1\times 5^3\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{311}}^1$

素因数の和:357

約数の個数: 64

約数和(自身を含む): 42052608

約数和(自身を除く): 20243733

約数列:

[1, 3, 5, 11, 15, 17, 25, 33, 51, 55, 75, 85, 125, 165, 187, 255, 275, 311, 375, 425, 561, 825, 933, 935, 1275, 1375, 1555, 2125, 2805, 3421, 4125, 4665, 4675, 5287, 6375, 7775, 10263, 14025, 15861, 17105, 23325, 23375, 26435, 38875, 51315, 58157, 70125, 79305, 85525, 116625, 132175, 174471, 256575, 290785, 396525, 427625, 660875, 872355, 1282875, 1453925, 1982625, 4361775, 7269625, 21808875]

約数ペア:

[(1, 21808875), (3, 7269625), (5, 4361775), (11, 1982625), (15, 1453925), (17, 1282875), (25, 872355), (33, 660875), (51, 427625), (55, 396525), (75, 290785), (85, 256575), (125, 174471), (165, 132175), (187, 116625), (255, 85525), (275, 79305), (311, 70125), (375, 58157), (425, 51315), (561, 38875), (825, 26435), (933, 23375), (935, 23325), (1275, 17105), (1375, 15861), (1555, 14025), (2125, 10263), (2805, 7775), (3421, 6375), (4125, 5287), (4665, 4675)]