20397760

素因数分解:

$2^6\times 5^1\times {\mathrm{63743}}^1$

素因数の和:63760

約数の個数: 28

約数和(自身を含む): 48572928

約数和(自身を除く): 28175168

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 63743, 127486, 254972, 318715, 509944, 637430, 1019888, 1274860, 2039776, 2549720, 4079552, 5099440, 10198880, 20397760]

約数ペア:

[(1, 20397760), (2, 10198880), (4, 5099440), (5, 4079552), (8, 2549720), (10, 2039776), (16, 1274860), (20, 1019888), (32, 637430), (40, 509944), (64, 318715), (80, 254972), (160, 127486), (320, 63743)]