278319645

素因数分解:

$3^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{9679}}^1$

素因数の和:9767

約数の個数: 40

約数和(自身を含む): 505992960

約数和(自身を除く): 227673315

約数列:

[1, 3, 5, 9, 15, 27, 45, 71, 81, 135, 213, 355, 405, 639, 1065, 1917, 3195, 5751, 9585, 9679, 28755, 29037, 48395, 87111, 145185, 261333, 435555, 687209, 783999, 1306665, 2061627, 3436045, 3919995, 6184881, 10308135, 18554643, 30924405, 55663929, 92773215, 278319645]

約数ペア:

[(1, 278319645), (3, 92773215), (5, 55663929), (9, 30924405), (15, 18554643), (27, 10308135), (45, 6184881), (71, 3919995), (81, 3436045), (135, 2061627), (213, 1306665), (355, 783999), (405, 687209), (639, 435555), (1065, 261333), (1917, 145185), (3195, 87111), (5751, 48395), (9585, 29037), (9679, 28755)]