81365715

素因数分解:

$3^4\times 5^1\times {\mathrm{200903}}^1$

素因数の和:200920

約数の個数: 20

約数和(自身を含む): 145856304

約数和(自身を除く): 64490589

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 200903, 602709, 1004515, 1808127, 3013545, 5424381, 9040635, 16273143, 27121905, 81365715]

約数ペア:

[(1, 81365715), (3, 27121905), (5, 16273143), (9, 9040635), (15, 5424381), (27, 3013545), (45, 1808127), (81, 1004515), (135, 602709), (405, 200903)]