821745

素因数分解:

$3^4\times 5^1\times {\mathrm{2029}}^1$

素因数の和:2046

約数の個数: 20

約数和(自身を含む): 1473780

約数和(自身を除く): 652035

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 2029, 6087, 10145, 18261, 30435, 54783, 91305, 164349, 273915, 821745]

約数ペア:

[(1, 821745), (3, 273915), (5, 164349), (9, 91305), (15, 54783), (27, 30435), (45, 18261), (81, 10145), (135, 6087), (405, 2029)]