21442540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{103}}^1\times {\mathrm{1487}}^1$

素因数の和:1606

約数の個数: 48

約数和(自身を含む): 51996672

約数和(自身を除く): 30554132

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 103, 140, 206, 412, 515, 721, 1030, 1442, 1487, 2060, 2884, 2974, 3605, 5948, 7210, 7435, 10409, 14420, 14870, 20818, 29740, 41636, 52045, 104090, 153161, 208180, 306322, 612644, 765805, 1072127, 1531610, 2144254, 3063220, 4288508, 5360635, 10721270, 21442540]

約数ペア:

[(1, 21442540), (2, 10721270), (4, 5360635), (5, 4288508), (7, 3063220), (10, 2144254), (14, 1531610), (20, 1072127), (28, 765805), (35, 612644), (70, 306322), (103, 208180), (140, 153161), (206, 104090), (412, 52045), (515, 41636), (721, 29740), (1030, 20818), (1442, 14870), (1487, 14420), (2060, 10409), (2884, 7435), (2974, 7210), (3605, 5948)]