21181671

素因数分解:

$3^2\times 7^2\times {\mathrm{43}}^1\times {\mathrm{1117}}^1$

素因数の和:1180

約数の個数: 36

約数和(自身を含む): 36451272

約数和(自身を除く): 15269601

約数列:

[1, 3, 7, 9, 21, 43, 49, 63, 129, 147, 301, 387, 441, 903, 1117, 2107, 2709, 3351, 6321, 7819, 10053, 18963, 23457, 48031, 54733, 70371, 144093, 164199, 336217, 432279, 492597, 1008651, 2353519, 3025953, 7060557, 21181671]

約数ペア:

[(1, 21181671), (3, 7060557), (7, 3025953), (9, 2353519), (21, 1008651), (43, 492597), (49, 432279), (63, 336217), (129, 164199), (147, 144093), (301, 70371), (387, 54733), (441, 48031), (903, 23457), (1117, 18963), (2107, 10053), (2709, 7819), (3351, 6321)]