128515120

素因数分解:

$2^4\times 5^1\times {\mathrm{1606439}}^1$

素因数の和:1606452

約数の個数: 20

約数和(自身を含む): 298797840

約数和(自身を除く): 170282720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1606439, 3212878, 6425756, 8032195, 12851512, 16064390, 25703024, 32128780, 64257560, 128515120]

約数ペア:

[(1, 128515120), (2, 64257560), (4, 32128780), (5, 25703024), (8, 16064390), (10, 12851512), (16, 8032195), (20, 6425756), (40, 3212878), (80, 1606439)]