20964741

素因数分解:

$3^1\times 7^1\times {\mathrm{647}}^1\times {\mathrm{1543}}^1$

素因数の和:2200

約数の個数: 16

約数和(自身を含む): 32016384

約数和(自身を除く): 11051643

約数列:

[1, 3, 7, 21, 647, 1543, 1941, 4529, 4629, 10801, 13587, 32403, 998321, 2994963, 6988247, 20964741]

約数ペア:

[(1, 20964741), (3, 6988247), (7, 2994963), (21, 998321), (647, 32403), (1543, 13587), (1941, 10801), (4529, 4629)]