21643760

素因数分解:

$2^4\times 5^1\times {\mathrm{270547}}^1$

素因数の和:270560

約数の個数: 20

約数和(自身を含む): 50321928

約数和(自身を除く): 28678168

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 270547, 541094, 1082188, 1352735, 2164376, 2705470, 4328752, 5410940, 10821880, 21643760]

約数ペア:

[(1, 21643760), (2, 10821880), (4, 5410940), (5, 4328752), (8, 2705470), (10, 2164376), (16, 1352735), (20, 1082188), (40, 541094), (80, 270547)]