257405715

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{421}}^1\times {\mathrm{647}}^1$

素因数の和:1089

約数の個数: 64

約数和(自身を含む): 525035520

約数和(自身を除く): 267629805

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 105, 135, 189, 315, 421, 647, 945, 1263, 1941, 2105, 2947, 3235, 3789, 4529, 5823, 6315, 8841, 9705, 11367, 13587, 14735, 17469, 18945, 22645, 26523, 29115, 40761, 44205, 56835, 67935, 79569, 87345, 122283, 132615, 203805, 272387, 397845, 611415, 817161, 1361935, 1906709, 2451483, 4085805, 5720127, 7354449, 9533545, 12257415, 17160381, 28600635, 36772245, 51481143, 85801905, 257405715]

約数ペア:

[(1, 257405715), (3, 85801905), (5, 51481143), (7, 36772245), (9, 28600635), (15, 17160381), (21, 12257415), (27, 9533545), (35, 7354449), (45, 5720127), (63, 4085805), (105, 2451483), (135, 1906709), (189, 1361935), (315, 817161), (421, 611415), (647, 397845), (945, 272387), (1263, 203805), (1941, 132615), (2105, 122283), (2947, 87345), (3235, 79569), (3789, 67935), (4529, 56835), (5823, 44205), (6315, 40761), (8841, 29115), (9705, 26523), (11367, 22645), (13587, 18945), (14735, 17469)]