20820303

素因数分解:

$3^2\times 7^1\times {\mathrm{563}}^1\times {\mathrm{587}}^1$

素因数の和:1163

約数の個数: 24

約数和(自身を含む): 34489728

約数和(自身を除く): 13669425

約数列:

[1, 3, 7, 9, 21, 63, 563, 587, 1689, 1761, 3941, 4109, 5067, 5283, 11823, 12327, 35469, 36981, 330481, 991443, 2313367, 2974329, 6940101, 20820303]

約数ペア:

[(1, 20820303), (3, 6940101), (7, 2974329), (9, 2313367), (21, 991443), (63, 330481), (563, 36981), (587, 35469), (1689, 12327), (1761, 11823), (3941, 5283), (4109, 5067)]