20663769

素因数分解:

$3^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{13859}}^1$

素因数の和:13940

約数の個数: 16

約数和(自身を含む): 31933440

約数和(自身を除く): 11269671

約数列:

[1, 3, 7, 21, 71, 213, 497, 1491, 13859, 41577, 97013, 291039, 983989, 2951967, 6887923, 20663769]

約数ペア:

[(1, 20663769), (3, 6887923), (7, 2951967), (21, 983989), (71, 291039), (213, 97013), (497, 41577), (1491, 13859)]