28758261

素因数分解:

$3^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{127}}^1\times {\mathrm{263}}^1$

素因数の和:441

約数の個数: 32

約数和(自身を含む): 45416448

約数和(自身を除く): 16658187

約数列:

[1, 3, 7, 21, 41, 123, 127, 263, 287, 381, 789, 861, 889, 1841, 2667, 5207, 5523, 10783, 15621, 32349, 33401, 36449, 75481, 100203, 109347, 226443, 233807, 701421, 1369441, 4108323, 9586087, 28758261]

約数ペア:

[(1, 28758261), (3, 9586087), (7, 4108323), (21, 1369441), (41, 701421), (123, 233807), (127, 226443), (263, 109347), (287, 100203), (381, 75481), (789, 36449), (861, 33401), (889, 32349), (1841, 15621), (2667, 10783), (5207, 5523)]