81639320

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{291569}}^1$

素因数の和:291587

約数の個数: 32

約数和(自身を含む): 209930400

約数和(自身を除く): 128291080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 291569, 583138, 1166276, 1457845, 2040983, 2332552, 2915690, 4081966, 5831380, 8163932, 10204915, 11662760, 16327864, 20409830, 40819660, 81639320]

約数ペア:

[(1, 81639320), (2, 40819660), (4, 20409830), (5, 16327864), (7, 11662760), (8, 10204915), (10, 8163932), (14, 5831380), (20, 4081966), (28, 2915690), (35, 2332552), (40, 2040983), (56, 1457845), (70, 1166276), (140, 583138), (280, 291569)]