20281079

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1$

素因数の和:207

約数の個数: 32

約数和(自身を含む): 26256384

約数和(自身を除く): 5975305

約数列:

[1, 7, 13, 43, 71, 73, 91, 301, 497, 511, 559, 923, 949, 3053, 3139, 3913, 5183, 6461, 6643, 21371, 21973, 36281, 39689, 40807, 67379, 222869, 277823, 285649, 471653, 1560083, 2897297, 20281079]

約数ペア:

[(1, 20281079), (7, 2897297), (13, 1560083), (43, 471653), (71, 285649), (73, 277823), (91, 222869), (301, 67379), (497, 40807), (511, 39689), (559, 36281), (923, 21973), (949, 21371), (3053, 6643), (3139, 6461), (3913, 5183)]