18420747

素因数分解:

$3^1\times {\mathrm{19}}^2\times {\mathrm{73}}^1\times {\mathrm{233}}^1$

素因数の和:347

約数の個数: 24

約数和(自身を含む): 26389584

約数和(自身を除く): 7968837

約数列:

[1, 3, 19, 57, 73, 219, 233, 361, 699, 1083, 1387, 4161, 4427, 13281, 17009, 26353, 51027, 79059, 84113, 252339, 323171, 969513, 6140249, 18420747]

約数ペア:

[(1, 18420747), (3, 6140249), (19, 969513), (57, 323171), (73, 252339), (219, 84113), (233, 79059), (361, 51027), (699, 26353), (1083, 17009), (1387, 13281), (4161, 4427)]