21137937

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{6997}}^1$

素因数の和:7072

約数の個数: 16

約数和(自身を含む): 30231360

約数和(自身を除く): 9093423

約数列:

[1, 3, 19, 53, 57, 159, 1007, 3021, 6997, 20991, 132943, 370841, 398829, 1112523, 7045979, 21137937]

約数ペア:

[(1, 21137937), (3, 7045979), (19, 1112523), (53, 398829), (57, 370841), (159, 132943), (1007, 20991), (3021, 6997)]