21312339

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{509}}^1\times {\mathrm{821}}^1$

素因数の和:1350

約数の個数: 16

約数和(自身を含む): 30183840

約数和(自身を除く): 8871501

約数列:

[1, 3, 17, 51, 509, 821, 1527, 2463, 8653, 13957, 25959, 41871, 417889, 1253667, 7104113, 21312339]

約数ペア:

[(1, 21312339), (3, 7104113), (17, 1253667), (51, 417889), (509, 41871), (821, 25959), (1527, 13957), (2463, 8653)]