20837560

素因数分解:

$2^3\times 5^1\times {\mathrm{257}}^1\times {\mathrm{2027}}^1$

素因数の和:2295

約数の個数: 32

約数和(自身を含む): 47090160

約数和(自身を除く): 26252600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 257, 514, 1028, 1285, 2027, 2056, 2570, 4054, 5140, 8108, 10135, 10280, 16216, 20270, 40540, 81080, 520939, 1041878, 2083756, 2604695, 4167512, 5209390, 10418780, 20837560]

約数ペア:

[(1, 20837560), (2, 10418780), (4, 5209390), (5, 4167512), (8, 2604695), (10, 2083756), (20, 1041878), (40, 520939), (257, 81080), (514, 40540), (1028, 20270), (1285, 16216), (2027, 10280), (2056, 10135), (2570, 8108), (4054, 5140)]