638709543

素因数分解:

$3^4\times {\mathrm{29}}^1\times {\mathrm{127}}^1\times {\mathrm{2141}}^1$

素因数の和:2309

約数の個数: 40

約数和(自身を含む): 995258880

約数和(自身を除く): 356549337

約数列:

[1, 3, 9, 27, 29, 81, 87, 127, 261, 381, 783, 1143, 2141, 2349, 3429, 3683, 6423, 10287, 11049, 19269, 33147, 57807, 62089, 99441, 173421, 186267, 271907, 298323, 558801, 815721, 1676403, 2447163, 5029209, 7341489, 7885303, 22024467, 23655909, 70967727, 212903181, 638709543]

約数ペア:

[(1, 638709543), (3, 212903181), (9, 70967727), (27, 23655909), (29, 22024467), (81, 7885303), (87, 7341489), (127, 5029209), (261, 2447163), (381, 1676403), (783, 815721), (1143, 558801), (2141, 298323), (2349, 271907), (3429, 186267), (3683, 173421), (6423, 99441), (10287, 62089), (11049, 57807), (19269, 33147)]