20010991

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19991}}^1$

素因数の和:20022

約数の個数: 16

約数和(自身を含む): 26869248

約数和(自身を除く): 6858257

約数列:

[1, 7, 11, 13, 77, 91, 143, 1001, 19991, 139937, 219901, 259883, 1539307, 1819181, 2858713, 20010991]

約数ペア:

[(1, 20010991), (7, 2858713), (11, 1819181), (13, 1539307), (77, 259883), (91, 219901), (143, 139937), (1001, 19991)]