21715841

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{229}}^1$

素因数の和:309

約数の個数: 32

約数和(自身を含む): 28262400

約数和(自身を除く): 6546559

約数列:

[1, 7, 19, 23, 31, 133, 161, 217, 229, 437, 589, 713, 1603, 3059, 4123, 4351, 4991, 5267, 7099, 13547, 30457, 36869, 49693, 94829, 100073, 134881, 163277, 700511, 944167, 1142939, 3102263, 21715841]

約数ペア:

[(1, 21715841), (7, 3102263), (19, 1142939), (23, 944167), (31, 700511), (133, 163277), (161, 134881), (217, 100073), (229, 94829), (437, 49693), (589, 36869), (713, 30457), (1603, 13547), (3059, 7099), (4123, 5267), (4351, 4991)]