21296439

素因数分解:

$3^4\times {\mathrm{163}}^1\times {\mathrm{1613}}^1$

素因数の和:1788

約数の個数: 20

約数和(自身を含む): 32028216

約数和(自身を除く): 10731777

約数列:

[1, 3, 9, 27, 81, 163, 489, 1467, 1613, 4401, 4839, 13203, 14517, 43551, 130653, 262919, 788757, 2366271, 7098813, 21296439]

約数ペア:

[(1, 21296439), (3, 7098813), (9, 2366271), (27, 788757), (81, 262919), (163, 130653), (489, 43551), (1467, 14517), (1613, 13203), (4401, 4839)]