18865287

素因数分解:

$3^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{4909}}^1$

素因数の和:4983

約数の個数: 24

約数和(自身を含む): 31659680

約数和(自身を除く): 12794393

約数列:

[1, 3, 7, 9, 21, 61, 63, 183, 427, 549, 1281, 3843, 4909, 14727, 34363, 44181, 103089, 299449, 309267, 898347, 2096143, 2695041, 6288429, 18865287]

約数ペア:

[(1, 18865287), (3, 6288429), (7, 2695041), (9, 2096143), (21, 898347), (61, 309267), (63, 299449), (183, 103089), (427, 44181), (549, 34363), (1281, 14727), (3843, 4909)]