19861605

素因数分解:

$3^6\times 5^1\times {\mathrm{5449}}^1$

素因数の和:5472

約数の個数: 28

約数和(自身を含む): 35741100

約数和(自身を除く): 15879495

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 729, 1215, 3645, 5449, 16347, 27245, 49041, 81735, 147123, 245205, 441369, 735615, 1324107, 2206845, 3972321, 6620535, 19861605]

約数ペア:

[(1, 19861605), (3, 6620535), (5, 3972321), (9, 2206845), (15, 1324107), (27, 735615), (45, 441369), (81, 245205), (135, 147123), (243, 81735), (405, 49041), (729, 27245), (1215, 16347), (3645, 5449)]