20940800

素因数分解:

$2^{11}\times 5^2\times {\mathrm{409}}^1$

素因数の和:441

約数の個数: 72

約数和(自身を含む): 52047450

約数和(自身を除く): 31106650

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 128, 160, 200, 256, 320, 400, 409, 512, 640, 800, 818, 1024, 1280, 1600, 1636, 2045, 2048, 2560, 3200, 3272, 4090, 5120, 6400, 6544, 8180, 10225, 10240, 12800, 13088, 16360, 20450, 25600, 26176, 32720, 40900, 51200, 52352, 65440, 81800, 104704, 130880, 163600, 209408, 261760, 327200, 418816, 523520, 654400, 837632, 1047040, 1308800, 2094080, 2617600, 4188160, 5235200, 10470400, 20940800]

約数ペア:

[(1, 20940800), (2, 10470400), (4, 5235200), (5, 4188160), (8, 2617600), (10, 2094080), (16, 1308800), (20, 1047040), (25, 837632), (32, 654400), (40, 523520), (50, 418816), (64, 327200), (80, 261760), (100, 209408), (128, 163600), (160, 130880), (200, 104704), (256, 81800), (320, 65440), (400, 52352), (409, 51200), (512, 40900), (640, 32720), (800, 26176), (818, 25600), (1024, 20450), (1280, 16360), (1600, 13088), (1636, 12800), (2045, 10240), (2048, 10225), (2560, 8180), (3200, 6544), (3272, 6400), (4090, 5120)]