2580280

素因数分解:

$2^3\times 5^1\times {\mathrm{251}}^1\times {\mathrm{257}}^1$

素因数の和:519

約数の個数: 32

約数和(自身を含む): 5851440

約数和(自身を除く): 3271160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 251, 257, 502, 514, 1004, 1028, 1255, 1285, 2008, 2056, 2510, 2570, 5020, 5140, 10040, 10280, 64507, 129014, 258028, 322535, 516056, 645070, 1290140, 2580280]

約数ペア:

[(1, 2580280), (2, 1290140), (4, 645070), (5, 516056), (8, 322535), (10, 258028), (20, 129014), (40, 64507), (251, 10280), (257, 10040), (502, 5140), (514, 5020), (1004, 2570), (1028, 2510), (1255, 2056), (1285, 2008)]