20618480

素因数分解:

$2^4\times 5^1\times {\mathrm{257731}}^1$

素因数の和:257744

約数の個数: 20

約数和(自身を含む): 47938152

約数和(自身を除く): 27319672

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 257731, 515462, 1030924, 1288655, 2061848, 2577310, 4123696, 5154620, 10309240, 20618480]

約数ペア:

[(1, 20618480), (2, 10309240), (4, 5154620), (5, 4123696), (8, 2577310), (10, 2061848), (16, 1288655), (20, 1030924), (40, 515462), (80, 257731)]