20987240

素因数分解:

$2^3\times 5^1\times {\mathrm{524681}}^1$

素因数の和:524692

約数の個数: 16

約数和(自身を含む): 47221380

約数和(自身を除く): 26234140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 524681, 1049362, 2098724, 2623405, 4197448, 5246810, 10493620, 20987240]

約数ペア:

[(1, 20987240), (2, 10493620), (4, 5246810), (5, 4197448), (8, 2623405), (10, 2098724), (20, 1049362), (40, 524681)]