20782500

素因数分解:

$2^2\times 3^1\times 5^4\times {\mathrm{17}}^1\times {\mathrm{163}}^1$

素因数の和:207

約数の個数: 120

約数和(自身を含む): 64554336

約数和(自身を除く): 43771836

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 17, 20, 25, 30, 34, 50, 51, 60, 68, 75, 85, 100, 102, 125, 150, 163, 170, 204, 250, 255, 300, 326, 340, 375, 425, 489, 500, 510, 625, 652, 750, 815, 850, 978, 1020, 1250, 1275, 1500, 1630, 1700, 1875, 1956, 2125, 2445, 2500, 2550, 2771, 3260, 3750, 4075, 4250, 4890, 5100, 5542, 6375, 7500, 8150, 8313, 8500, 9780, 10625, 11084, 12225, 12750, 13855, 16300, 16626, 20375, 21250, 24450, 25500, 27710, 31875, 33252, 40750, 41565, 42500, 48900, 55420, 61125, 63750, 69275, 81500, 83130, 101875, 122250, 127500, 138550, 166260, 203750, 207825, 244500, 277100, 305625, 346375, 407500, 415650, 611250, 692750, 831300, 1039125, 1222500, 1385500, 1731875, 2078250, 3463750, 4156500, 5195625, 6927500, 10391250, 20782500]

約数ペア:

[(1, 20782500), (2, 10391250), (3, 6927500), (4, 5195625), (5, 4156500), (6, 3463750), (10, 2078250), (12, 1731875), (15, 1385500), (17, 1222500), (20, 1039125), (25, 831300), (30, 692750), (34, 611250), (50, 415650), (51, 407500), (60, 346375), (68, 305625), (75, 277100), (85, 244500), (100, 207825), (102, 203750), (125, 166260), (150, 138550), (163, 127500), (170, 122250), (204, 101875), (250, 83130), (255, 81500), (300, 69275), (326, 63750), (340, 61125), (375, 55420), (425, 48900), (489, 42500), (500, 41565), (510, 40750), (625, 33252), (652, 31875), (750, 27710), (815, 25500), (850, 24450), (978, 21250), (1020, 20375), (1250, 16626), (1275, 16300), (1500, 13855), (1630, 12750), (1700, 12225), (1875, 11084), (1956, 10625), (2125, 9780), (2445, 8500), (2500, 8313), (2550, 8150), (2771, 7500), (3260, 6375), (3750, 5542), (4075, 5100), (4250, 4890)]