81907281

素因数分解:

$3^5\times {\mathrm{29}}^1\times {\mathrm{59}}^1\times {\mathrm{197}}^1$

素因数の和:300

約数の個数: 48

約数和(自身を含む): 129729600

約数和(自身を除く): 47822319

約数列:

[1, 3, 9, 27, 29, 59, 81, 87, 177, 197, 243, 261, 531, 591, 783, 1593, 1711, 1773, 2349, 4779, 5133, 5319, 5713, 7047, 11623, 14337, 15399, 15957, 17139, 34869, 46197, 47871, 51417, 104607, 138591, 154251, 313821, 337067, 415773, 462753, 941463, 1011201, 1388259, 2824389, 3033603, 9100809, 27302427, 81907281]

約数ペア:

[(1, 81907281), (3, 27302427), (9, 9100809), (27, 3033603), (29, 2824389), (59, 1388259), (81, 1011201), (87, 941463), (177, 462753), (197, 415773), (243, 337067), (261, 313821), (531, 154251), (591, 138591), (783, 104607), (1593, 51417), (1711, 47871), (1773, 46197), (2349, 34869), (4779, 17139), (5133, 15957), (5319, 15399), (5713, 14337), (7047, 11623)]