20725397

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{223}}^1$

素因数の和:329

約数の個数: 32

約数和(自身を含む): 27869184

約数和(自身を除く): 7143787

約数列:

[1, 7, 11, 17, 71, 77, 119, 187, 223, 497, 781, 1207, 1309, 1561, 2453, 3791, 5467, 8449, 13277, 15833, 17171, 26537, 41701, 92939, 110831, 174163, 269161, 291907, 1219141, 1884127, 2960771, 20725397]

約数ペア:

[(1, 20725397), (7, 2960771), (11, 1884127), (17, 1219141), (71, 291907), (77, 269161), (119, 174163), (187, 110831), (223, 92939), (497, 41701), (781, 26537), (1207, 17171), (1309, 15833), (1561, 13277), (2453, 8449), (3791, 5467)]