21684105

素因数分解:

$3^8\times 5^1\times {\mathrm{661}}^1$

素因数の和:690

約数の個数: 36

約数和(自身を含む): 39088452

約数和(自身を除く): 17404347

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 661, 729, 1215, 1983, 2187, 3305, 3645, 5949, 6561, 9915, 10935, 17847, 29745, 32805, 53541, 89235, 160623, 267705, 481869, 803115, 1445607, 2409345, 4336821, 7228035, 21684105]

約数ペア:

[(1, 21684105), (3, 7228035), (5, 4336821), (9, 2409345), (15, 1445607), (27, 803115), (45, 481869), (81, 267705), (135, 160623), (243, 89235), (405, 53541), (661, 32805), (729, 29745), (1215, 17847), (1983, 10935), (2187, 9915), (3305, 6561), (3645, 5949)]