28399815

素因数分解:

$3^4\times 5^1\times {\mathrm{70123}}^1$

素因数の和:70140

約数の個数: 20

約数和(自身を含む): 50910024

約数和(自身を除く): 22510209

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 70123, 210369, 350615, 631107, 1051845, 1893321, 3155535, 5679963, 9466605, 28399815]

約数ペア:

[(1, 28399815), (3, 9466605), (5, 5679963), (9, 3155535), (15, 1893321), (27, 1051845), (45, 631107), (81, 350615), (135, 210369), (405, 70123)]