20856775

素因数分解:

$5^2\times {\mathrm{19}}^2\times {\mathrm{2311}}^1$

素因数の和:2359

約数の個数: 18

約数和(自身を含む): 27307032

約数和(自身を除く): 6450257

約数列:

[1, 5, 19, 25, 95, 361, 475, 1805, 2311, 9025, 11555, 43909, 57775, 219545, 834271, 1097725, 4171355, 20856775]

約数ペア:

[(1, 20856775), (5, 4171355), (19, 1097725), (25, 834271), (95, 219545), (361, 57775), (475, 43909), (1805, 11555), (2311, 9025)]