21253455

素因数分解:

$3^3\times 5^1\times {\mathrm{157433}}^1$

素因数の和:157447

約数の個数: 16

約数和(自身を含む): 37784160

約数和(自身を除く): 16530705

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 157433, 472299, 787165, 1416897, 2361495, 4250691, 7084485, 21253455]

約数ペア:

[(1, 21253455), (3, 7084485), (5, 4250691), (9, 2361495), (15, 1416897), (27, 787165), (45, 472299), (135, 157433)]