About the Number

1281752640

1281752639 ← → 1281752641

2進数表記:1001100011001011111111001000000

漢数字表記:十二億八千百七十五万二千六百四十

素因数分解:

2 6 × 3 3 × 5 1 × 7 1 × 21193 1

素因数の和:21226
約数の個数: 224
約数和(自身を含む): 5167944960
約数和(自身を除く): 3886192320

約数列:
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 27, 28, 30, 32, 35, 36, 40, 42, 45, 48, 54, 56, 60, 63, 64, 70, 72, 80, 84, 90, 96, 105, 108, 112, 120, 126, 135, 140, 144, 160, 168, 180, 189, 192, 210, 216, 224, 240, 252, 270, 280, 288, 315, 320, 336, 360, 378, 420, 432, 448, 480, 504, 540, 560, 576, 630, 672, 720, 756, 840, 864, 945, 960, 1008, 1080, 1120, 1260, 1344, 1440, 1512, 1680, 1728, 1890, 2016, 2160, 2240, 2520, 2880, 3024, 3360, 3780, 4032, 4320, 5040, 6048, 6720, 7560, 8640, 10080, 12096, 15120, 20160, 21193, 30240, 42386, 60480, 63579, 84772, 105965, 127158, 148351, 169544, 190737, 211930, 254316, 296702, 317895, 339088, 381474, 423860, 445053, 508632, 572211, 593404, 635790, 678176, 741755, 762948, 847720, 890106, 953685, 1017264, 1144422, 1186808, 1271580, 1335159, 1356352, 1483510, 1525896, 1695440, 1780212, 1907370, 2034528, 2225265, 2288844, 2373616, 2543160, 2670318, 2861055, 2967020, 3051792, 3390880, 3560424, 3814740, 4005477, 4069056, 4450530, 4577688, 4747232, 5086320, 5340636, 5722110, 5934040, 6103584, 6675795, 6781760, 7120848, 7629480, 8010954, 8901060, 9155376, 9494464, 10172640, 10681272, 11444220, 11868080, 12207168, 13351590, 14241696, 15258960, 16021908, 17802120, 18310752, 20027385, 20345280, 21362544, 22888440, 23736160, 26703180, 28483392, 30517920, 32043816, 35604240, 36621504, 40054770, 42725088, 45776880, 47472320, 53406360, 61035840, 64087632, 71208480, 80109540, 85450176, 91553760, 106812720, 128175264, 142416960, 160219080, 183107520, 213625440, 256350528, 320438160, 427250880, 640876320, 1281752640]

約数ペア:
[(1, 1281752640), (2, 640876320), (3, 427250880), (4, 320438160), (5, 256350528), (6, 213625440), (7, 183107520), (8, 160219080), (9, 142416960), (10, 128175264), (12, 106812720), (14, 91553760), (15, 85450176), (16, 80109540), (18, 71208480), (20, 64087632), (21, 61035840), (24, 53406360), (27, 47472320), (28, 45776880), (30, 42725088), (32, 40054770), (35, 36621504), (36, 35604240), (40, 32043816), (42, 30517920), (45, 28483392), (48, 26703180), (54, 23736160), (56, 22888440), (60, 21362544), (63, 20345280), (64, 20027385), (70, 18310752), (72, 17802120), (80, 16021908), (84, 15258960), (90, 14241696), (96, 13351590), (105, 12207168), (108, 11868080), (112, 11444220), (120, 10681272), (126, 10172640), (135, 9494464), (140, 9155376), (144, 8901060), (160, 8010954), (168, 7629480), (180, 7120848), (189, 6781760), (192, 6675795), (210, 6103584), (216, 5934040), (224, 5722110), (240, 5340636), (252, 5086320), (270, 4747232), (280, 4577688), (288, 4450530), (315, 4069056), (320, 4005477), (336, 3814740), (360, 3560424), (378, 3390880), (420, 3051792), (432, 2967020), (448, 2861055), (480, 2670318), (504, 2543160), (540, 2373616), (560, 2288844), (576, 2225265), (630, 2034528), (672, 1907370), (720, 1780212), (756, 1695440), (840, 1525896), (864, 1483510), (945, 1356352), (960, 1335159), (1008, 1271580), (1080, 1186808), (1120, 1144422), (1260, 1017264), (1344, 953685), (1440, 890106), (1512, 847720), (1680, 762948), (1728, 741755), (1890, 678176), (2016, 635790), (2160, 593404), (2240, 572211), (2520, 508632), (2880, 445053), (3024, 423860), (3360, 381474), (3780, 339088), (4032, 317895), (4320, 296702), (5040, 254316), (6048, 211930), (6720, 190737), (7560, 169544), (8640, 148351), (10080, 127158), (12096, 105965), (15120, 84772), (20160, 63579), (21193, 60480), (30240, 42386)]

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