20664640

素因数分解:

$2^6\times 5^1\times {\mathrm{64577}}^1$

素因数の和:64594

約数の個数: 28

約数和(自身を含む): 49208436

約数和(自身を除く): 28543796

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 64577, 129154, 258308, 322885, 516616, 645770, 1033232, 1291540, 2066464, 2583080, 4132928, 5166160, 10332320, 20664640]

約数ペア:

[(1, 20664640), (2, 10332320), (4, 5166160), (5, 4132928), (8, 2583080), (10, 2066464), (16, 1291540), (20, 1033232), (32, 645770), (40, 516616), (64, 322885), (80, 258308), (160, 129154), (320, 64577)]