21720007681

素因数分解:

${\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{101}}^1\times {\mathrm{281}}^1\times {\mathrm{857}}^1$

素因数の和:1305

約数の個数: 32

約数和(自身を含む): 23692331520

約数和(自身を除く): 1972323839

約数列:

[1, 19, 47, 101, 281, 857, 893, 1919, 4747, 5339, 13207, 16283, 28381, 40279, 86557, 90193, 240817, 250933, 539239, 765301, 1333907, 1644583, 4068179, 4575523, 11318399, 24322517, 25344233, 77295401, 215049581, 462127823, 1143158299, 21720007681]

約数ペア:

[(1, 21720007681), (19, 1143158299), (47, 462127823), (101, 215049581), (281, 77295401), (857, 25344233), (893, 24322517), (1919, 11318399), (4747, 4575523), (5339, 4068179), (13207, 1644583), (16283, 1333907), (28381, 765301), (40279, 539239), (86557, 250933), (90193, 240817)]