21921599

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{2897}}^1$

素因数の和:2974

約数の個数: 16

約数和(自身を含む): 26707968

約数和(自身を除く): 4786369

約数列:

[1, 7, 23, 47, 161, 329, 1081, 2897, 7567, 20279, 66631, 136159, 466417, 953113, 3131657, 21921599]

約数ペア:

[(1, 21921599), (7, 3131657), (23, 953113), (47, 466417), (161, 136159), (329, 66631), (1081, 20279), (2897, 7567)]