19809789

素因数分解:

$3^1\times {\mathrm{137}}^1\times {\mathrm{157}}^1\times {\mathrm{307}}^1$

素因数の和:604

約数の個数: 16

約数和(自身を含む): 26862528

約数和(自身を除く): 7052739

約数列:

[1, 3, 137, 157, 307, 411, 471, 921, 21509, 42059, 48199, 64527, 126177, 144597, 6603263, 19809789]

約数ペア:

[(1, 19809789), (3, 6603263), (137, 144597), (157, 126177), (307, 64527), (411, 48199), (471, 42059), (921, 21509)]