20496880

素因数分解:

$2^4\times 5^1\times {\mathrm{256211}}^1$

素因数の和:256224

約数の個数: 20

約数和(自身を含む): 47655432

約数和(自身を除く): 27158552

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 256211, 512422, 1024844, 1281055, 2049688, 2562110, 4099376, 5124220, 10248440, 20496880]

約数ペア:

[(1, 20496880), (2, 10248440), (4, 5124220), (5, 4099376), (8, 2562110), (10, 2049688), (16, 1281055), (20, 1024844), (40, 512422), (80, 256211)]