21591040

素因数分解:

$2^{10}\times 5^1\times {\mathrm{4217}}^1$

素因数の和:4242

約数の個数: 44

約数和(自身を含む): 51805476

約数和(自身を除く): 30214436

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1024, 1280, 2560, 4217, 5120, 8434, 16868, 21085, 33736, 42170, 67472, 84340, 134944, 168680, 269888, 337360, 539776, 674720, 1079552, 1349440, 2159104, 2698880, 4318208, 5397760, 10795520, 21591040]

約数ペア:

[(1, 21591040), (2, 10795520), (4, 5397760), (5, 4318208), (8, 2698880), (10, 2159104), (16, 1349440), (20, 1079552), (32, 674720), (40, 539776), (64, 337360), (80, 269888), (128, 168680), (160, 134944), (256, 84340), (320, 67472), (512, 42170), (640, 33736), (1024, 21085), (1280, 16868), (2560, 8434), (4217, 5120)]