8641520

素因数分解:

$2^4\times 5^1\times {\mathrm{109}}^1\times {\mathrm{991}}^1$

素因数の和:1113

約数の個数: 40

約数和(自身を含む): 20296320

約数和(自身を除く): 11654800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 109, 218, 436, 545, 872, 991, 1090, 1744, 1982, 2180, 3964, 4360, 4955, 7928, 8720, 9910, 15856, 19820, 39640, 79280, 108019, 216038, 432076, 540095, 864152, 1080190, 1728304, 2160380, 4320760, 8641520]

約数ペア:

[(1, 8641520), (2, 4320760), (4, 2160380), (5, 1728304), (8, 1080190), (10, 864152), (16, 540095), (20, 432076), (40, 216038), (80, 108019), (109, 79280), (218, 39640), (436, 19820), (545, 15856), (872, 9910), (991, 8720), (1090, 7928), (1744, 4955), (1982, 4360), (2180, 3964)]