278759460

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{663713}}^1$

素因数の和:663732

約数の個数: 48

約数和(自身を含む): 892031616

約数和(自身を除く): 613272156

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 663713, 1327426, 1991139, 2654852, 3318565, 3982278, 4645991, 6637130, 7964556, 9291982, 9955695, 13274260, 13937973, 18583964, 19911390, 23229955, 27875946, 39822780, 46459910, 55751892, 69689865, 92919820, 139379730, 278759460]

約数ペア:

[(1, 278759460), (2, 139379730), (3, 92919820), (4, 69689865), (5, 55751892), (6, 46459910), (7, 39822780), (10, 27875946), (12, 23229955), (14, 19911390), (15, 18583964), (20, 13937973), (21, 13274260), (28, 9955695), (30, 9291982), (35, 7964556), (42, 6637130), (60, 4645991), (70, 3982278), (84, 3318565), (105, 2654852), (140, 1991139), (210, 1327426), (420, 663713)]