21812085

素因数分解:

$3^4\times 5^1\times {\mathrm{53857}}^1$

素因数の和:53874

約数の個数: 20

約数和(自身を含む): 39100908

約数和(自身を除く): 17288823

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 53857, 161571, 269285, 484713, 807855, 1454139, 2423565, 4362417, 7270695, 21812085]

約数ペア:

[(1, 21812085), (3, 7270695), (5, 4362417), (9, 2423565), (15, 1454139), (27, 807855), (45, 484713), (81, 269285), (135, 161571), (405, 53857)]