21772120

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{8923}}^1$

素因数の和:8995

約数の個数: 32

約数和(自身を含む): 49795920

約数和(自身を除く): 28023800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 8923, 17846, 35692, 44615, 71384, 89230, 178460, 356920, 544303, 1088606, 2177212, 2721515, 4354424, 5443030, 10886060, 21772120]

約数ペア:

[(1, 21772120), (2, 10886060), (4, 5443030), (5, 4354424), (8, 2721515), (10, 2177212), (20, 1088606), (40, 544303), (61, 356920), (122, 178460), (244, 89230), (305, 71384), (488, 44615), (610, 35692), (1220, 17846), (2440, 8923)]