20718399

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{89}}^1\times {\mathrm{127}}^1$

素因数の和:279

約数の個数: 32

約数和(自身を含む): 30965760

約数和(自身を除く): 10247361

約数列:

[1, 3, 13, 39, 47, 89, 127, 141, 267, 381, 611, 1157, 1651, 1833, 3471, 4183, 4953, 5969, 11303, 12549, 17907, 33909, 54379, 77597, 146939, 163137, 232791, 440817, 531241, 1593723, 6906133, 20718399]

約数ペア:

[(1, 20718399), (3, 6906133), (13, 1593723), (39, 531241), (47, 440817), (89, 232791), (127, 163137), (141, 146939), (267, 77597), (381, 54379), (611, 33909), (1157, 17907), (1651, 12549), (1833, 11303), (3471, 5969), (4183, 4953)]