20428191

素因数分解:

$3^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{4567}}^1$

素因数の和:4651

約数の個数: 24

約数和(自身を含む): 34205184

約数和(自身を除く): 13776993

約数列:

[1, 3, 7, 9, 21, 63, 71, 213, 497, 639, 1491, 4473, 4567, 13701, 31969, 41103, 95907, 287721, 324257, 972771, 2269799, 2918313, 6809397, 20428191]

約数ペア:

[(1, 20428191), (3, 6809397), (7, 2918313), (9, 2269799), (21, 972771), (63, 324257), (71, 287721), (213, 95907), (497, 41103), (639, 31969), (1491, 13701), (4473, 4567)]