21091091

素因数分解:

$7^1\times {\mathrm{29}}^1\times {\mathrm{107}}^1\times {\mathrm{971}}^1$

素因数の和:1114

約数の個数: 16

約数和(自身を含む): 25194240

約数和(自身を除く): 4103149

約数列:

[1, 7, 29, 107, 203, 749, 971, 3103, 6797, 21721, 28159, 103897, 197113, 727279, 3013013, 21091091]

約数ペア:

[(1, 21091091), (7, 3013013), (29, 727279), (107, 197113), (203, 103897), (749, 28159), (971, 21721), (3103, 6797)]