12728080

素因数分解:

$2^4\times 5^1\times {\mathrm{389}}^1\times {\mathrm{409}}^1$

素因数の和:811

約数の個数: 40

約数和(自身を含む): 29741400

約数和(自身を除く): 17013320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 389, 409, 778, 818, 1556, 1636, 1945, 2045, 3112, 3272, 3890, 4090, 6224, 6544, 7780, 8180, 15560, 16360, 31120, 32720, 159101, 318202, 636404, 795505, 1272808, 1591010, 2545616, 3182020, 6364040, 12728080]

約数ペア:

[(1, 12728080), (2, 6364040), (4, 3182020), (5, 2545616), (8, 1591010), (10, 1272808), (16, 795505), (20, 636404), (40, 318202), (80, 159101), (389, 32720), (409, 31120), (778, 16360), (818, 15560), (1556, 8180), (1636, 7780), (1945, 6544), (2045, 6224), (3112, 4090), (3272, 3890)]