21810711

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{491}}^1$

素因数の和:591

約数の個数: 32

約数和(自身を含む): 33723648

約数和(自身を除く): 11912937

約数列:

[1, 3, 13, 17, 39, 51, 67, 201, 221, 491, 663, 871, 1139, 1473, 2613, 3417, 6383, 8347, 14807, 19149, 25041, 32897, 44421, 98691, 108511, 325533, 427661, 559249, 1282983, 1677747, 7270237, 21810711]

約数ペア:

[(1, 21810711), (3, 7270237), (13, 1677747), (17, 1282983), (39, 559249), (51, 427661), (67, 325533), (201, 108511), (221, 98691), (491, 44421), (663, 32897), (871, 25041), (1139, 19149), (1473, 14807), (2613, 8347), (3417, 6383)]