12728840

素因数分解:

$2^3\times 5^1\times {\mathrm{223}}^1\times {\mathrm{1427}}^1$

素因数の和:1661

約数の個数: 32

約数和(自身を含む): 28788480

約数和(自身を除く): 16059640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 223, 446, 892, 1115, 1427, 1784, 2230, 2854, 4460, 5708, 7135, 8920, 11416, 14270, 28540, 57080, 318221, 636442, 1272884, 1591105, 2545768, 3182210, 6364420, 12728840]

約数ペア:

[(1, 12728840), (2, 6364420), (4, 3182210), (5, 2545768), (8, 1591105), (10, 1272884), (20, 636442), (40, 318221), (223, 57080), (446, 28540), (892, 14270), (1115, 11416), (1427, 8920), (1784, 7135), (2230, 5708), (2854, 4460)]