51220000

素因数分解:

$2^5\times 5^4\times {\mathrm{13}}^1\times {\mathrm{197}}^1$

素因数の和:240

約数の個数: 120

約数和(自身を含む): 136390716

約数和(自身を除く): 85170716

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 32, 40, 50, 52, 65, 80, 100, 104, 125, 130, 160, 197, 200, 208, 250, 260, 325, 394, 400, 416, 500, 520, 625, 650, 788, 800, 985, 1000, 1040, 1250, 1300, 1576, 1625, 1970, 2000, 2080, 2500, 2561, 2600, 3152, 3250, 3940, 4000, 4925, 5000, 5122, 5200, 6304, 6500, 7880, 8125, 9850, 10000, 10244, 10400, 12805, 13000, 15760, 16250, 19700, 20000, 20488, 24625, 25610, 26000, 31520, 32500, 39400, 40976, 49250, 51220, 52000, 64025, 65000, 78800, 81952, 98500, 102440, 123125, 128050, 130000, 157600, 197000, 204880, 246250, 256100, 260000, 320125, 394000, 409760, 492500, 512200, 640250, 788000, 985000, 1024400, 1280500, 1600625, 1970000, 2048800, 2561000, 3201250, 3940000, 5122000, 6402500, 10244000, 12805000, 25610000, 51220000]

約数ペア:

[(1, 51220000), (2, 25610000), (4, 12805000), (5, 10244000), (8, 6402500), (10, 5122000), (13, 3940000), (16, 3201250), (20, 2561000), (25, 2048800), (26, 1970000), (32, 1600625), (40, 1280500), (50, 1024400), (52, 985000), (65, 788000), (80, 640250), (100, 512200), (104, 492500), (125, 409760), (130, 394000), (160, 320125), (197, 260000), (200, 256100), (208, 246250), (250, 204880), (260, 197000), (325, 157600), (394, 130000), (400, 128050), (416, 123125), (500, 102440), (520, 98500), (625, 81952), (650, 78800), (788, 65000), (800, 64025), (985, 52000), (1000, 51220), (1040, 49250), (1250, 40976), (1300, 39400), (1576, 32500), (1625, 31520), (1970, 26000), (2000, 25610), (2080, 24625), (2500, 20488), (2561, 20000), (2600, 19700), (3152, 16250), (3250, 15760), (3940, 13000), (4000, 12805), (4925, 10400), (5000, 10244), (5122, 10000), (5200, 9850), (6304, 8125), (6500, 7880)]