21687040

素因数分解:

$2^8\times 5^1\times {\mathrm{16943}}^1$

素因数の和:16964

約数の個数: 36

約数和(自身を含む): 51950304

約数和(自身を除く): 30263264

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 16943, 33886, 67772, 84715, 135544, 169430, 271088, 338860, 542176, 677720, 1084352, 1355440, 2168704, 2710880, 4337408, 5421760, 10843520, 21687040]

約数ペア:

[(1, 21687040), (2, 10843520), (4, 5421760), (5, 4337408), (8, 2710880), (10, 2168704), (16, 1355440), (20, 1084352), (32, 677720), (40, 542176), (64, 338860), (80, 271088), (128, 169430), (160, 135544), (256, 84715), (320, 67772), (640, 33886), (1280, 16943)]