18805905

素因数分解:

$3^3\times 5^1\times {\mathrm{139303}}^1$

素因数の和:139317

約数の個数: 16

約数和(自身を含む): 33432960

約数和(自身を除く): 14627055

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 139303, 417909, 696515, 1253727, 2089545, 3761181, 6268635, 18805905]

約数ペア:

[(1, 18805905), (3, 6268635), (5, 3761181), (9, 2089545), (15, 1253727), (27, 696515), (45, 417909), (135, 139303)]