81806134840

素因数分解:

$2^3\times 5^1\times {\mathrm{1607}}^1\times {\mathrm{1272653}}^1$

素因数の和:1274271

約数の個数: 32

約数和(自身を含む): 184178486880

約数和(自身を除く): 102372352040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1607, 3214, 6428, 8035, 12856, 16070, 32140, 64280, 1272653, 2545306, 5090612, 6363265, 10181224, 12726530, 25453060, 50906120, 2045153371, 4090306742, 8180613484, 10225766855, 16361226968, 20451533710, 40903067420, 81806134840]

約数ペア:

[(1, 81806134840), (2, 40903067420), (4, 20451533710), (5, 16361226968), (8, 10225766855), (10, 8180613484), (20, 4090306742), (40, 2045153371), (1607, 50906120), (3214, 25453060), (6428, 12726530), (8035, 10181224), (12856, 6363265), (16070, 5090612), (32140, 2545306), (64280, 1272653)]