261528560

素因数分解:

$2^4\times 5^1\times {\mathrm{127}}^1\times {\mathrm{25741}}^1$

素因数の和:25881

約数の個数: 40

約数和(自身を含む): 612865536

約数和(自身を除く): 351336976

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 127, 254, 508, 635, 1016, 1270, 2032, 2540, 5080, 10160, 25741, 51482, 102964, 128705, 205928, 257410, 411856, 514820, 1029640, 2059280, 3269107, 6538214, 13076428, 16345535, 26152856, 32691070, 52305712, 65382140, 130764280, 261528560]

約数ペア:

[(1, 261528560), (2, 130764280), (4, 65382140), (5, 52305712), (8, 32691070), (10, 26152856), (16, 16345535), (20, 13076428), (40, 6538214), (80, 3269107), (127, 2059280), (254, 1029640), (508, 514820), (635, 411856), (1016, 257410), (1270, 205928), (2032, 128705), (2540, 102964), (5080, 51482), (10160, 25741)]