21380115

素因数分解:

$3^1\times 5^1\times {\mathrm{647}}^1\times {\mathrm{2203}}^1$

素因数の和:2858

約数の個数: 16

約数和(自身を含む): 34276608

約数和(自身を除く): 12896493

約数列:

[1, 3, 5, 15, 647, 1941, 2203, 3235, 6609, 9705, 11015, 33045, 1425341, 4276023, 7126705, 21380115]

約数ペア:

[(1, 21380115), (3, 7126705), (5, 4276023), (15, 1425341), (647, 33045), (1941, 11015), (2203, 9705), (3235, 6609)]