20820340

素因数分解:

$2^2\times 5^1\times {\mathrm{643}}^1\times {\mathrm{1619}}^1$

素因数の和:2271

約数の個数: 24

約数和(自身を含む): 43817760

約数和(自身を除く): 22997420

約数列:

[1, 2, 4, 5, 10, 20, 643, 1286, 1619, 2572, 3215, 3238, 6430, 6476, 8095, 12860, 16190, 32380, 1041017, 2082034, 4164068, 5205085, 10410170, 20820340]

約数ペア:

[(1, 20820340), (2, 10410170), (4, 5205085), (5, 4164068), (10, 2082034), (20, 1041017), (643, 32380), (1286, 16190), (1619, 12860), (2572, 8095), (3215, 6476), (3238, 6430)]