20988418

素因数分解:

$2^1\times {\mathrm{11}}^2\times {\mathrm{86729}}^1$

素因数の和:86753

約数の個数: 12

約数和(自身を含む): 34605270

約数和(自身を除く): 13616852

約数列:

[1, 2, 11, 22, 121, 242, 86729, 173458, 954019, 1908038, 10494209, 20988418]

約数ペア:

[(1, 20988418), (2, 10494209), (11, 1908038), (22, 954019), (121, 173458), (242, 86729)]