28751355

素因数分解:

$3^4\times 5^1\times {\mathrm{70991}}^1$

素因数の和:71008

約数の個数: 20

約数和(自身を含む): 51540192

約数和(自身を除く): 22788837

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 70991, 212973, 354955, 638919, 1064865, 1916757, 3194595, 5750271, 9583785, 28751355]

約数ペア:

[(1, 28751355), (3, 9583785), (5, 5750271), (9, 3194595), (15, 1916757), (27, 1064865), (45, 638919), (81, 354955), (135, 212973), (405, 70991)]