12940880

素因数分解:

$2^4\times 5^1\times {\mathrm{161761}}^1$

素因数の和:161774

約数の個数: 20

約数和(自身を含む): 30087732

約数和(自身を除く): 17146852

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 161761, 323522, 647044, 808805, 1294088, 1617610, 2588176, 3235220, 6470440, 12940880]

約数ペア:

[(1, 12940880), (2, 6470440), (4, 3235220), (5, 2588176), (8, 1617610), (10, 1294088), (16, 808805), (20, 647044), (40, 323522), (80, 161761)]