21720959

素因数分解:

${\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{101}}^1\times {\mathrm{233}}^1$

素因数の和:418

約数の個数: 16

約数和(自身を含む): 24058944

約数和(自身を除く): 2337985

約数列:

[1, 13, 71, 101, 233, 923, 1313, 3029, 7171, 16543, 23533, 93223, 215059, 305929, 1670843, 21720959]

約数ペア:

[(1, 21720959), (13, 1670843), (71, 305929), (101, 215059), (233, 93223), (923, 23533), (1313, 16543), (3029, 7171)]