21382137

素因数分解:

$3^4\times 7^1\times {\mathrm{43}}^1\times {\mathrm{877}}^1$

素因数の和:939

約数の個数: 40

約数和(自身を含む): 37395776

約数和(自身を除く): 16013639

約数列:

[1, 3, 7, 9, 21, 27, 43, 63, 81, 129, 189, 301, 387, 567, 877, 903, 1161, 2631, 2709, 3483, 6139, 7893, 8127, 18417, 23679, 24381, 37711, 55251, 71037, 113133, 165753, 263977, 339399, 497259, 791931, 1018197, 2375793, 3054591, 7127379, 21382137]

約数ペア:

[(1, 21382137), (3, 7127379), (7, 3054591), (9, 2375793), (21, 1018197), (27, 791931), (43, 497259), (63, 339399), (81, 263977), (129, 165753), (189, 113133), (301, 71037), (387, 55251), (567, 37711), (877, 24381), (903, 23679), (1161, 18417), (2631, 8127), (2709, 7893), (3483, 6139)]