81818120

素因数分解:

$2^3\times 5^1\times {\mathrm{523}}^1\times {\mathrm{3911}}^1$

素因数の和:4445

約数の個数: 32

約数和(自身を含む): 184489920

約数和(自身を除く): 102671800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 523, 1046, 2092, 2615, 3911, 4184, 5230, 7822, 10460, 15644, 19555, 20920, 31288, 39110, 78220, 156440, 2045453, 4090906, 8181812, 10227265, 16363624, 20454530, 40909060, 81818120]

約数ペア:

[(1, 81818120), (2, 40909060), (4, 20454530), (5, 16363624), (8, 10227265), (10, 8181812), (20, 4090906), (40, 2045453), (523, 156440), (1046, 78220), (2092, 39110), (2615, 31288), (3911, 20920), (4184, 19555), (5230, 15644), (7822, 10460)]