20009358740

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{497993}}^1$

素因数の和:498057

約数の個数: 72

約数和(自身を含む): 50072300712

約数和(自身を除く): 30062941972

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 41, 49, 70, 82, 98, 140, 164, 196, 205, 245, 287, 410, 490, 574, 820, 980, 1148, 1435, 2009, 2870, 4018, 5740, 8036, 10045, 20090, 40180, 497993, 995986, 1991972, 2489965, 3485951, 4979930, 6971902, 9959860, 13943804, 17429755, 20417713, 24401657, 34859510, 40835426, 48803314, 69719020, 81670852, 97606628, 102088565, 122008285, 142923991, 204177130, 244016570, 285847982, 408354260, 488033140, 571695964, 714619955, 1000467937, 1429239910, 2000935874, 2858479820, 4001871748, 5002339685, 10004679370, 20009358740]

約数ペア:

[(1, 20009358740), (2, 10004679370), (4, 5002339685), (5, 4001871748), (7, 2858479820), (10, 2000935874), (14, 1429239910), (20, 1000467937), (28, 714619955), (35, 571695964), (41, 488033140), (49, 408354260), (70, 285847982), (82, 244016570), (98, 204177130), (140, 142923991), (164, 122008285), (196, 102088565), (205, 97606628), (245, 81670852), (287, 69719020), (410, 48803314), (490, 40835426), (574, 34859510), (820, 24401657), (980, 20417713), (1148, 17429755), (1435, 13943804), (2009, 9959860), (2870, 6971902), (4018, 4979930), (5740, 3485951), (8036, 2489965), (10045, 1991972), (20090, 995986), (40180, 497993)]