19810219

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{281}}^1$

素因数の和:351

約数の個数: 32

約数和(自身を含む): 25583040

約数和(自身を除く): 5772821

約数列:

[1, 11, 13, 17, 29, 143, 187, 221, 281, 319, 377, 493, 2431, 3091, 3653, 4147, 4777, 5423, 6409, 8149, 40183, 52547, 62101, 70499, 89639, 105937, 138533, 683111, 1165307, 1523863, 1800929, 19810219]

約数ペア:

[(1, 19810219), (11, 1800929), (13, 1523863), (17, 1165307), (29, 683111), (143, 138533), (187, 105937), (221, 89639), (281, 70499), (319, 62101), (377, 52547), (493, 40183), (2431, 8149), (3091, 6409), (3653, 5423), (4147, 4777)]