20537420

素因数分解:

$2^2\times 5^1\times {\mathrm{643}}^1\times {\mathrm{1597}}^1$

素因数の和:2249

約数の個数: 24

約数和(自身を含む): 43222704

約数和(自身を除く): 22685284

約数列:

[1, 2, 4, 5, 10, 20, 643, 1286, 1597, 2572, 3194, 3215, 6388, 6430, 7985, 12860, 15970, 31940, 1026871, 2053742, 4107484, 5134355, 10268710, 20537420]

約数ペア:

[(1, 20537420), (2, 10268710), (4, 5134355), (5, 4107484), (10, 2053742), (20, 1026871), (643, 31940), (1286, 15970), (1597, 12860), (2572, 7985), (3194, 6430), (3215, 6388)]