81621135

素因数分解:

$3^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{97}}^1\times {\mathrm{271}}^1$

素因数の和:405

約数の個数: 64

約数和(自身を含む): 153538560

約数和(自身を除く): 71917425

約数列:

[1, 3, 5, 9, 15, 23, 27, 45, 69, 97, 115, 135, 207, 271, 291, 345, 485, 621, 813, 873, 1035, 1355, 1455, 2231, 2439, 2619, 3105, 4065, 4365, 6233, 6693, 7317, 11155, 12195, 13095, 18699, 20079, 26287, 31165, 33465, 36585, 56097, 60237, 78861, 93495, 100395, 131435, 168291, 236583, 280485, 301185, 394305, 604601, 709749, 841455, 1182915, 1813803, 3023005, 3548745, 5441409, 9069015, 16324227, 27207045, 81621135]

約数ペア:

[(1, 81621135), (3, 27207045), (5, 16324227), (9, 9069015), (15, 5441409), (23, 3548745), (27, 3023005), (45, 1813803), (69, 1182915), (97, 841455), (115, 709749), (135, 604601), (207, 394305), (271, 301185), (291, 280485), (345, 236583), (485, 168291), (621, 131435), (813, 100395), (873, 93495), (1035, 78861), (1355, 60237), (1455, 56097), (2231, 36585), (2439, 33465), (2619, 31165), (3105, 26287), (4065, 20079), (4365, 18699), (6233, 13095), (6693, 12195), (7317, 11155)]