256265721

素因数分解:

$3^3\times {\mathrm{29}}^1\times {\mathrm{509}}^1\times {\mathrm{643}}^1$

素因数の和:1190

約数の個数: 32

約数和(自身を含む): 394128000

約数和(自身を除く): 137862279

約数列:

[1, 3, 9, 27, 29, 87, 261, 509, 643, 783, 1527, 1929, 4581, 5787, 13743, 14761, 17361, 18647, 44283, 55941, 132849, 167823, 327287, 398547, 503469, 981861, 2945583, 8836749, 9491323, 28473969, 85421907, 256265721]

約数ペア:

[(1, 256265721), (3, 85421907), (9, 28473969), (27, 9491323), (29, 8836749), (87, 2945583), (261, 981861), (509, 503469), (643, 398547), (783, 327287), (1527, 167823), (1929, 132849), (4581, 55941), (5787, 44283), (13743, 18647), (14761, 17361)]