20999811

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{997}}^1$

素因数の和:1083

約数の個数: 32

約数和(自身を含む): 34490880

約数和(自身を除く): 13491069

約数列:

[1, 3, 7, 17, 21, 51, 59, 119, 177, 357, 413, 997, 1003, 1239, 2991, 3009, 6979, 7021, 16949, 20937, 21063, 50847, 58823, 118643, 176469, 355929, 411761, 999991, 1235283, 2999973, 6999937, 20999811]

約数ペア:

[(1, 20999811), (3, 6999937), (7, 2999973), (17, 1235283), (21, 999991), (51, 411761), (59, 355929), (119, 176469), (177, 118643), (357, 58823), (413, 50847), (997, 21063), (1003, 20937), (1239, 16949), (2991, 7021), (3009, 6979)]