131231415

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{1987}}^1$

素因数の和:2056

約数の個数: 64

約数和(自身を含む): 261080064

約数和(自身を除く): 129848649

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 37, 51, 85, 105, 111, 119, 185, 255, 259, 357, 555, 595, 629, 777, 1295, 1785, 1887, 1987, 3145, 3885, 4403, 5961, 9435, 9935, 13209, 13909, 22015, 29805, 33779, 41727, 66045, 69545, 73519, 101337, 168895, 208635, 220557, 236453, 367595, 506685, 514633, 709359, 1102785, 1182265, 1249823, 1543899, 2573165, 3546795, 3749469, 6249115, 7719495, 8748761, 18747345, 26246283, 43743805, 131231415]

約数ペア:

[(1, 131231415), (3, 43743805), (5, 26246283), (7, 18747345), (15, 8748761), (17, 7719495), (21, 6249115), (35, 3749469), (37, 3546795), (51, 2573165), (85, 1543899), (105, 1249823), (111, 1182265), (119, 1102785), (185, 709359), (255, 514633), (259, 506685), (357, 367595), (555, 236453), (595, 220557), (629, 208635), (777, 168895), (1295, 101337), (1785, 73519), (1887, 69545), (1987, 66045), (3145, 41727), (3885, 33779), (4403, 29805), (5961, 22015), (9435, 13909), (9935, 13209)]