128212840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{457903}}^1$

素因数の和:457921

約数の個数: 32

約数和(自身を含む): 329690880

約数和(自身を除く): 201478040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 457903, 915806, 1831612, 2289515, 3205321, 3663224, 4579030, 6410642, 9158060, 12821284, 16026605, 18316120, 25642568, 32053210, 64106420, 128212840]

約数ペア:

[(1, 128212840), (2, 64106420), (4, 32053210), (5, 25642568), (7, 18316120), (8, 16026605), (10, 12821284), (14, 9158060), (20, 6410642), (28, 4579030), (35, 3663224), (40, 3205321), (56, 2289515), (70, 1831612), (140, 915806), (280, 457903)]