21180160

素因数分解:

$2^8\times 5^1\times {\mathrm{16547}}^1$

素因数の和:16568

約数の個数: 36

約数和(自身を含む): 50736168

約数和(自身を除く): 29556008

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 16547, 33094, 66188, 82735, 132376, 165470, 264752, 330940, 529504, 661880, 1059008, 1323760, 2118016, 2647520, 4236032, 5295040, 10590080, 21180160]

約数ペア:

[(1, 21180160), (2, 10590080), (4, 5295040), (5, 4236032), (8, 2647520), (10, 2118016), (16, 1323760), (20, 1059008), (32, 661880), (40, 529504), (64, 330940), (80, 264752), (128, 165470), (160, 132376), (256, 82735), (320, 66188), (640, 33094), (1280, 16547)]