21053417

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{3851}}^1$

素因数の和:3940

約数の個数: 16

約数和(自身を含む): 26625024

約数和(自身を除く): 5571607

約数列:

[1, 7, 11, 71, 77, 497, 781, 3851, 5467, 26957, 42361, 273421, 296527, 1913947, 3007631, 21053417]

約数ペア:

[(1, 21053417), (7, 3007631), (11, 1913947), (71, 296527), (77, 273421), (497, 42361), (781, 26957), (3851, 5467)]