21002895

素因数分解:

$3^4\times 5^1\times {\mathrm{51859}}^1$

素因数の和:51876

約数の個数: 20

約数和(自身を含む): 37650360

約数和(自身を除く): 16647465

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 51859, 155577, 259295, 466731, 777885, 1400193, 2333655, 4200579, 7000965, 21002895]

約数ペア:

[(1, 21002895), (3, 7000965), (5, 4200579), (9, 2333655), (15, 1400193), (27, 777885), (45, 466731), (81, 259295), (135, 155577), (405, 51859)]