21047943

素因数分解:

$3^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{18911}}^1$

素因数の和:18974

約数の個数: 16

約数和(自身を含む): 32679936

約数和(自身を除く): 11631993

約数列:

[1, 3, 7, 21, 53, 159, 371, 1113, 18911, 56733, 132377, 397131, 1002283, 3006849, 7015981, 21047943]

約数ペア:

[(1, 21047943), (3, 7015981), (7, 3006849), (21, 1002283), (53, 397131), (159, 132377), (371, 56733), (1113, 18911)]