20408320

素因数分解:

$2^{11}\times 5^1\times {\mathrm{1993}}^1$

素因数の和:2020

約数の個数: 48

約数和(自身を含む): 48992580

約数和(自身を除く): 28584260

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1024, 1280, 1993, 2048, 2560, 3986, 5120, 7972, 9965, 10240, 15944, 19930, 31888, 39860, 63776, 79720, 127552, 159440, 255104, 318880, 510208, 637760, 1020416, 1275520, 2040832, 2551040, 4081664, 5102080, 10204160, 20408320]

約数ペア:

[(1, 20408320), (2, 10204160), (4, 5102080), (5, 4081664), (8, 2551040), (10, 2040832), (16, 1275520), (20, 1020416), (32, 637760), (40, 510208), (64, 318880), (80, 255104), (128, 159440), (160, 127552), (256, 79720), (320, 63776), (512, 39860), (640, 31888), (1024, 19930), (1280, 15944), (1993, 10240), (2048, 9965), (2560, 7972), (3986, 5120)]