19779991

素因数分解:

$7^1\times {\mathrm{11}}^4\times {\mathrm{193}}^1$

素因数の和:244

約数の個数: 20

約数和(自身を含む): 24994960

約数和(自身を除く): 5214969

約数列:

[1, 7, 11, 77, 121, 193, 847, 1331, 1351, 2123, 9317, 14641, 14861, 23353, 102487, 163471, 256883, 1798181, 2825713, 19779991]

約数ペア:

[(1, 19779991), (7, 2825713), (11, 1798181), (77, 256883), (121, 163471), (193, 102487), (847, 23353), (1331, 14861), (1351, 14641), (2123, 9317)]