19965891

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{673}}^1$

素因数の和:747

約数の個数: 32

約数和(自身を含む): 31057920

約数和(自身を除く): 11092029

約数列:

[1, 3, 11, 29, 31, 33, 87, 93, 319, 341, 673, 899, 957, 1023, 2019, 2697, 7403, 9889, 19517, 20863, 22209, 29667, 58551, 62589, 214687, 229493, 605027, 644061, 688479, 1815081, 6655297, 19965891]

約数ペア:

[(1, 19965891), (3, 6655297), (11, 1815081), (29, 688479), (31, 644061), (33, 605027), (87, 229493), (93, 214687), (319, 62589), (341, 58551), (673, 29667), (899, 22209), (957, 20863), (1023, 19517), (2019, 9889), (2697, 7403)]