20980785

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{211}}^1\times {\mathrm{947}}^1$

素因数の和:1173

約数の個数: 32

約数和(自身を含む): 38587392

約数和(自身を除く): 17606607

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 211, 633, 947, 1055, 1477, 2841, 3165, 4431, 4735, 6629, 7385, 14205, 19887, 22155, 33145, 99435, 199817, 599451, 999085, 1398719, 2997255, 4196157, 6993595, 20980785]

約数ペア:

[(1, 20980785), (3, 6993595), (5, 4196157), (7, 2997255), (15, 1398719), (21, 999085), (35, 599451), (105, 199817), (211, 99435), (633, 33145), (947, 22155), (1055, 19887), (1477, 14205), (2841, 7385), (3165, 6629), (4431, 4735)]