64678840

素因数分解:

$2^3\times 5^1\times {\mathrm{557}}^1\times {\mathrm{2903}}^1$

素因数の和:3471

約数の個数: 32

約数和(自身を含む): 145838880

約数和(自身を除く): 81160040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 557, 1114, 2228, 2785, 2903, 4456, 5570, 5806, 11140, 11612, 14515, 22280, 23224, 29030, 58060, 116120, 1616971, 3233942, 6467884, 8084855, 12935768, 16169710, 32339420, 64678840]

約数ペア:

[(1, 64678840), (2, 32339420), (4, 16169710), (5, 12935768), (8, 8084855), (10, 6467884), (20, 3233942), (40, 1616971), (557, 116120), (1114, 58060), (2228, 29030), (2785, 23224), (2903, 22280), (4456, 14515), (5570, 11612), (5806, 11140)]