21046640

素因数分解:

$2^4\times 5^1\times {\mathrm{263083}}^1$

素因数の和:263096

約数の個数: 20

約数和(自身を含む): 48933624

約数和(自身を除く): 27886984

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 263083, 526166, 1052332, 1315415, 2104664, 2630830, 4209328, 5261660, 10523320, 21046640]

約数ペア:

[(1, 21046640), (2, 10523320), (4, 5261660), (5, 4209328), (8, 2630830), (10, 2104664), (16, 1315415), (20, 1052332), (40, 526166), (80, 263083)]