40939520

素因数分解:

$2^{12}\times 5^1\times {\mathrm{1999}}^1$

素因数の和:2028

約数の個数: 52

約数和(自身を含む): 98292000

約数和(自身を除く): 57352480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1024, 1280, 1999, 2048, 2560, 3998, 4096, 5120, 7996, 9995, 10240, 15992, 19990, 20480, 31984, 39980, 63968, 79960, 127936, 159920, 255872, 319840, 511744, 639680, 1023488, 1279360, 2046976, 2558720, 4093952, 5117440, 8187904, 10234880, 20469760, 40939520]

約数ペア:

[(1, 40939520), (2, 20469760), (4, 10234880), (5, 8187904), (8, 5117440), (10, 4093952), (16, 2558720), (20, 2046976), (32, 1279360), (40, 1023488), (64, 639680), (80, 511744), (128, 319840), (160, 255872), (256, 159920), (320, 127936), (512, 79960), (640, 63968), (1024, 39980), (1280, 31984), (1999, 20480), (2048, 19990), (2560, 15992), (3998, 10240), (4096, 9995), (5120, 7996)]