28681821

素因数分解:

$3^2\times 7^1\times {\mathrm{197}}^1\times {\mathrm{2311}}^1$

素因数の和:2521

約数の個数: 24

約数和(自身を含む): 47608704

約数和(自身を除く): 18926883

約数列:

[1, 3, 7, 9, 21, 63, 197, 591, 1379, 1773, 2311, 4137, 6933, 12411, 16177, 20799, 48531, 145593, 455267, 1365801, 3186869, 4097403, 9560607, 28681821]

約数ペア:

[(1, 28681821), (3, 9560607), (7, 4097403), (9, 3186869), (21, 1365801), (63, 455267), (197, 145593), (591, 48531), (1379, 20799), (1773, 16177), (2311, 12411), (4137, 6933)]