20817225

素因数分解:

$3^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{647}}^1$

素因数の和:687

約数の個数: 72

約数和(自身を含む): 43872192

約数和(自身を除く): 23054967

約数列:

[1, 3, 5, 9, 11, 13, 15, 25, 33, 39, 45, 55, 65, 75, 99, 117, 143, 165, 195, 225, 275, 325, 429, 495, 585, 647, 715, 825, 975, 1287, 1941, 2145, 2475, 2925, 3235, 3575, 5823, 6435, 7117, 8411, 9705, 10725, 16175, 21351, 25233, 29115, 32175, 35585, 42055, 48525, 64053, 75699, 92521, 106755, 126165, 145575, 177925, 210275, 277563, 320265, 378495, 462605, 533775, 630825, 832689, 1387815, 1601325, 1892475, 2313025, 4163445, 6939075, 20817225]

約数ペア:

[(1, 20817225), (3, 6939075), (5, 4163445), (9, 2313025), (11, 1892475), (13, 1601325), (15, 1387815), (25, 832689), (33, 630825), (39, 533775), (45, 462605), (55, 378495), (65, 320265), (75, 277563), (99, 210275), (117, 177925), (143, 145575), (165, 126165), (195, 106755), (225, 92521), (275, 75699), (325, 64053), (429, 48525), (495, 42055), (585, 35585), (647, 32175), (715, 29115), (825, 25233), (975, 21351), (1287, 16175), (1941, 10725), (2145, 9705), (2475, 8411), (2925, 7117), (3235, 6435), (3575, 5823)]