21398871

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{313}}^1\times {\mathrm{1753}}^1$

素因数の和:2082

約数の個数: 16

約数和(自身を含む): 30842336

約数和(自身を除く): 9443465

約数列:

[1, 3, 13, 39, 313, 939, 1753, 4069, 5259, 12207, 22789, 68367, 548689, 1646067, 7132957, 21398871]

約数ペア:

[(1, 21398871), (3, 7132957), (13, 1646067), (39, 548689), (313, 68367), (939, 22789), (1753, 12207), (4069, 5259)]