20488000

素因数分解:

$2^6\times 5^3\times {\mathrm{13}}^1\times {\mathrm{197}}^1$

素因数の和:237

約数の個数: 112

約数和(自身を含む): 54918864

約数和(自身を除く): 34430864

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 32, 40, 50, 52, 64, 65, 80, 100, 104, 125, 130, 160, 197, 200, 208, 250, 260, 320, 325, 394, 400, 416, 500, 520, 650, 788, 800, 832, 985, 1000, 1040, 1300, 1576, 1600, 1625, 1970, 2000, 2080, 2561, 2600, 3152, 3250, 3940, 4000, 4160, 4925, 5122, 5200, 6304, 6500, 7880, 8000, 9850, 10244, 10400, 12608, 12805, 13000, 15760, 19700, 20488, 20800, 24625, 25610, 26000, 31520, 39400, 40976, 49250, 51220, 52000, 63040, 64025, 78800, 81952, 98500, 102440, 104000, 128050, 157600, 163904, 197000, 204880, 256100, 315200, 320125, 394000, 409760, 512200, 640250, 788000, 819520, 1024400, 1280500, 1576000, 2048800, 2561000, 4097600, 5122000, 10244000, 20488000]

約数ペア:

[(1, 20488000), (2, 10244000), (4, 5122000), (5, 4097600), (8, 2561000), (10, 2048800), (13, 1576000), (16, 1280500), (20, 1024400), (25, 819520), (26, 788000), (32, 640250), (40, 512200), (50, 409760), (52, 394000), (64, 320125), (65, 315200), (80, 256100), (100, 204880), (104, 197000), (125, 163904), (130, 157600), (160, 128050), (197, 104000), (200, 102440), (208, 98500), (250, 81952), (260, 78800), (320, 64025), (325, 63040), (394, 52000), (400, 51220), (416, 49250), (500, 40976), (520, 39400), (650, 31520), (788, 26000), (800, 25610), (832, 24625), (985, 20800), (1000, 20488), (1040, 19700), (1300, 15760), (1576, 13000), (1600, 12805), (1625, 12608), (1970, 10400), (2000, 10244), (2080, 9850), (2561, 8000), (2600, 7880), (3152, 6500), (3250, 6304), (3940, 5200), (4000, 5122), (4160, 4925)]