28718739

素因数分解:

$3^3\times 7^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1\times {\mathrm{61}}^1$

素因数の和:177

約数の個数: 64

約数和(自身を含む): 51425280

約数和(自身を除く): 22706541

約数列:

[1, 3, 7, 9, 21, 27, 47, 53, 61, 63, 141, 159, 183, 189, 329, 371, 423, 427, 477, 549, 987, 1113, 1269, 1281, 1431, 1647, 2491, 2867, 2961, 3233, 3339, 3843, 7473, 8601, 8883, 9699, 10017, 11529, 17437, 20069, 22419, 22631, 25803, 29097, 52311, 60207, 67257, 67893, 77409, 87291, 151951, 156933, 180621, 203679, 455853, 470799, 541863, 611037, 1063657, 1367559, 3190971, 4102677, 9572913, 28718739]

約数ペア:

[(1, 28718739), (3, 9572913), (7, 4102677), (9, 3190971), (21, 1367559), (27, 1063657), (47, 611037), (53, 541863), (61, 470799), (63, 455853), (141, 203679), (159, 180621), (183, 156933), (189, 151951), (329, 87291), (371, 77409), (423, 67893), (427, 67257), (477, 60207), (549, 52311), (987, 29097), (1113, 25803), (1269, 22631), (1281, 22419), (1431, 20069), (1647, 17437), (2491, 11529), (2867, 10017), (2961, 9699), (3233, 8883), (3339, 8601), (3843, 7473)]