21707181

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{337}}^1\times {\mathrm{421}}^1$

素因数の和:781

約数の個数: 24

約数和(自身を含む): 33376824

約数和(自身を除く): 11669643

約数列:

[1, 3, 9, 17, 51, 153, 337, 421, 1011, 1263, 3033, 3789, 5729, 7157, 17187, 21471, 51561, 64413, 141877, 425631, 1276893, 2411909, 7235727, 21707181]

約数ペア:

[(1, 21707181), (3, 7235727), (9, 2411909), (17, 1276893), (51, 425631), (153, 141877), (337, 64413), (421, 51561), (1011, 21471), (1263, 17187), (3033, 7157), (3789, 5729)]