21806145

素因数分解:

$3^3\times 5^1\times {\mathrm{161527}}^1$

素因数の和:161541

約数の個数: 16

約数和(自身を含む): 38766720

約数和(自身を除く): 16960575

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 161527, 484581, 807635, 1453743, 2422905, 4361229, 7268715, 21806145]

約数ペア:

[(1, 21806145), (3, 7268715), (5, 4361229), (9, 2422905), (15, 1453743), (27, 807635), (45, 484581), (135, 161527)]