2561080

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{1489}}^1$

素因数の和:1543

約数の個数: 32

約数和(自身を含む): 5900400

約数和(自身を除く): 3339320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1489, 1720, 2978, 5956, 7445, 11912, 14890, 29780, 59560, 64027, 128054, 256108, 320135, 512216, 640270, 1280540, 2561080]

約数ペア:

[(1, 2561080), (2, 1280540), (4, 640270), (5, 512216), (8, 320135), (10, 256108), (20, 128054), (40, 64027), (43, 59560), (86, 29780), (172, 14890), (215, 11912), (344, 7445), (430, 5956), (860, 2978), (1489, 1720)]