20492960

素因数分解:

$2^5\times 5^1\times {\mathrm{263}}^1\times {\mathrm{487}}^1$

素因数の和:765

約数の個数: 48

約数和(自身を含む): 48698496

約数和(自身を除く): 28205536

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 263, 487, 526, 974, 1052, 1315, 1948, 2104, 2435, 2630, 3896, 4208, 4870, 5260, 7792, 8416, 9740, 10520, 15584, 19480, 21040, 38960, 42080, 77920, 128081, 256162, 512324, 640405, 1024648, 1280810, 2049296, 2561620, 4098592, 5123240, 10246480, 20492960]

約数ペア:

[(1, 20492960), (2, 10246480), (4, 5123240), (5, 4098592), (8, 2561620), (10, 2049296), (16, 1280810), (20, 1024648), (32, 640405), (40, 512324), (80, 256162), (160, 128081), (263, 77920), (487, 42080), (526, 38960), (974, 21040), (1052, 19480), (1315, 15584), (1948, 10520), (2104, 9740), (2435, 8416), (2630, 7792), (3896, 5260), (4208, 4870)]