21590919

素因数分解:

$3^2\times 7^2\times {\mathrm{173}}^1\times {\mathrm{283}}^1$

素因数の和:476

約数の個数: 36

約数和(自身を含む): 36617256

約数和(自身を除く): 15026337

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 173, 283, 441, 519, 849, 1211, 1557, 1981, 2547, 3633, 5943, 8477, 10899, 13867, 17829, 25431, 41601, 48959, 76293, 124803, 146877, 342713, 440631, 1028139, 2398991, 3084417, 7196973, 21590919]

約数ペア:

[(1, 21590919), (3, 7196973), (7, 3084417), (9, 2398991), (21, 1028139), (49, 440631), (63, 342713), (147, 146877), (173, 124803), (283, 76293), (441, 48959), (519, 41601), (849, 25431), (1211, 17829), (1557, 13867), (1981, 10899), (2547, 8477), (3633, 5943)]