80645720

素因数分解:

$2^3\times 5^1\times {\mathrm{223}}^1\times {\mathrm{9041}}^1$

素因数の和:9275

約数の個数: 32

約数和(自身を含む): 182286720

約数和(自身を除く): 101641000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 223, 446, 892, 1115, 1784, 2230, 4460, 8920, 9041, 18082, 36164, 45205, 72328, 90410, 180820, 361640, 2016143, 4032286, 8064572, 10080715, 16129144, 20161430, 40322860, 80645720]

約数ペア:

[(1, 80645720), (2, 40322860), (4, 20161430), (5, 16129144), (8, 10080715), (10, 8064572), (20, 4032286), (40, 2016143), (223, 361640), (446, 180820), (892, 90410), (1115, 72328), (1784, 45205), (2230, 36164), (4460, 18082), (8920, 9041)]