20821227

素因数分解:

$3^1\times 7^2\times {\mathrm{139}}^1\times {\mathrm{1019}}^1$

素因数の和:1175

約数の個数: 24

約数和(自身を含む): 32558400

約数和(自身を除く): 11737173

約数列:

[1, 3, 7, 21, 49, 139, 147, 417, 973, 1019, 2919, 3057, 6811, 7133, 20433, 21399, 49931, 141641, 149793, 424923, 991487, 2974461, 6940409, 20821227]

約数ペア:

[(1, 20821227), (3, 6940409), (7, 2974461), (21, 991487), (49, 424923), (139, 149793), (147, 141641), (417, 49931), (973, 21399), (1019, 20433), (2919, 7133), (3057, 6811)]