81630136

素因数分解:

$2^3\times 7^1\times {\mathrm{643}}^1\times {\mathrm{2267}}^1$

素因数の和:2923

約数の個数: 32

約数和(自身を含む): 175271040

約数和(自身を除く): 93640904

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 643, 1286, 2267, 2572, 4501, 4534, 5144, 9002, 9068, 15869, 18004, 18136, 31738, 36008, 63476, 126952, 1457681, 2915362, 5830724, 10203767, 11661448, 20407534, 40815068, 81630136]

約数ペア:

[(1, 81630136), (2, 40815068), (4, 20407534), (7, 11661448), (8, 10203767), (14, 5830724), (28, 2915362), (56, 1457681), (643, 126952), (1286, 63476), (2267, 36008), (2572, 31738), (4501, 18136), (4534, 18004), (5144, 15869), (9002, 9068)]