21278080

素因数分解:

$2^7\times 5^1\times {\mathrm{33247}}^1$

素因数の和:33266

約数の個数: 32

約数和(自身を含む): 50869440

約数和(自身を除く): 29591360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 33247, 66494, 132988, 166235, 265976, 332470, 531952, 664940, 1063904, 1329880, 2127808, 2659760, 4255616, 5319520, 10639040, 21278080]

約数ペア:

[(1, 21278080), (2, 10639040), (4, 5319520), (5, 4255616), (8, 2659760), (10, 2127808), (16, 1329880), (20, 1063904), (32, 664940), (40, 531952), (64, 332470), (80, 265976), (128, 166235), (160, 132988), (320, 66494), (640, 33247)]