12821560

素因数分解:

$2^3\times 5^1\times {\mathrm{320539}}^1$

素因数の和:320550

約数の個数: 16

約数和(自身を含む): 28848600

約数和(自身を除く): 16027040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 320539, 641078, 1282156, 1602695, 2564312, 3205390, 6410780, 12821560]

約数ペア:

[(1, 12821560), (2, 6410780), (4, 3205390), (5, 2564312), (8, 1602695), (10, 1282156), (20, 641078), (40, 320539)]