21479661

素因数分解:

$3^4\times 7^1\times {\mathrm{43}}^1\times {\mathrm{881}}^1$

素因数の和:943

約数の個数: 40

約数和(自身を含む): 37566144

約数和(自身を除く): 16086483

約数列:

[1, 3, 7, 9, 21, 27, 43, 63, 81, 129, 189, 301, 387, 567, 881, 903, 1161, 2643, 2709, 3483, 6167, 7929, 8127, 18501, 23787, 24381, 37883, 55503, 71361, 113649, 166509, 265181, 340947, 499527, 795543, 1022841, 2386629, 3068523, 7159887, 21479661]

約数ペア:

[(1, 21479661), (3, 7159887), (7, 3068523), (9, 2386629), (21, 1022841), (27, 795543), (43, 499527), (63, 340947), (81, 265181), (129, 166509), (189, 113649), (301, 71361), (387, 55503), (567, 37883), (881, 24381), (903, 23787), (1161, 18501), (2643, 8127), (2709, 7929), (3483, 6167)]