28155519

素因数分解:

$3^4\times 7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{127}}^1$

素因数の和:186

約数の個数: 80

約数和(自身を含む): 53526528

約数和(自身を除く): 25371009

約数列:

[1, 3, 7, 9, 17, 21, 23, 27, 51, 63, 69, 81, 119, 127, 153, 161, 189, 207, 357, 381, 391, 459, 483, 567, 621, 889, 1071, 1143, 1173, 1377, 1449, 1863, 2159, 2667, 2737, 2921, 3213, 3429, 3519, 4347, 6477, 8001, 8211, 8763, 9639, 10287, 10557, 13041, 15113, 19431, 20447, 24003, 24633, 26289, 31671, 45339, 49657, 58293, 61341, 72009, 73899, 78867, 136017, 148971, 174879, 184023, 221697, 236601, 347599, 408051, 446913, 552069, 1042797, 1224153, 1340739, 1656207, 3128391, 4022217, 9385173, 28155519]

約数ペア:

[(1, 28155519), (3, 9385173), (7, 4022217), (9, 3128391), (17, 1656207), (21, 1340739), (23, 1224153), (27, 1042797), (51, 552069), (63, 446913), (69, 408051), (81, 347599), (119, 236601), (127, 221697), (153, 184023), (161, 174879), (189, 148971), (207, 136017), (357, 78867), (381, 73899), (391, 72009), (459, 61341), (483, 58293), (567, 49657), (621, 45339), (889, 31671), (1071, 26289), (1143, 24633), (1173, 24003), (1377, 20447), (1449, 19431), (1863, 15113), (2159, 13041), (2667, 10557), (2737, 10287), (2921, 9639), (3213, 8763), (3429, 8211), (3519, 8001), (4347, 6477)]