131021891

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{83}}^2$

素因数の和:216

約数の個数: 48

約数和(自身を含む): 187434240

約数和(自身を除く): 56412349

約数列:

[1, 7, 11, 13, 19, 77, 83, 91, 133, 143, 209, 247, 581, 913, 1001, 1079, 1463, 1577, 1729, 2717, 6391, 6889, 7553, 11039, 11869, 17347, 19019, 20501, 48223, 75779, 83083, 89557, 121429, 130891, 143507, 225511, 530453, 626899, 916237, 985127, 1439801, 1578577, 1701583, 6895889, 10078607, 11911081, 18717413, 131021891]

約数ペア:

[(1, 131021891), (7, 18717413), (11, 11911081), (13, 10078607), (19, 6895889), (77, 1701583), (83, 1578577), (91, 1439801), (133, 985127), (143, 916237), (209, 626899), (247, 530453), (581, 225511), (913, 143507), (1001, 130891), (1079, 121429), (1463, 89557), (1577, 83083), (1729, 75779), (2717, 48223), (6391, 20501), (6889, 19019), (7553, 17347), (11039, 11869)]