1640020

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{1907}}^1$

素因数の和:1959

約数の個数: 24

約数和(自身を含む): 3525984

約数和(自身を除く): 1885964

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 1907, 3814, 7628, 9535, 19070, 38140, 82001, 164002, 328004, 410005, 820010, 1640020]

約数ペア:

[(1, 1640020), (2, 820010), (4, 410005), (5, 328004), (10, 164002), (20, 82001), (43, 38140), (86, 19070), (172, 9535), (215, 7628), (430, 3814), (860, 1907)]