640427760

素因数分解:

$2^4\times 3^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{4099}}^1$

素因数の和:4156

約数の個数: 240

約数和(自身を含む): 2537932800

約数和(自身を除く): 1897505040

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 28, 30, 31, 35, 36, 40, 42, 45, 48, 56, 60, 62, 63, 70, 72, 80, 84, 90, 93, 105, 112, 120, 124, 126, 140, 144, 155, 168, 180, 186, 210, 217, 240, 248, 252, 279, 280, 310, 315, 336, 360, 372, 420, 434, 465, 496, 504, 558, 560, 620, 630, 651, 720, 744, 840, 868, 930, 1008, 1085, 1116, 1240, 1260, 1302, 1395, 1488, 1680, 1736, 1860, 1953, 2170, 2232, 2480, 2520, 2604, 2790, 3255, 3472, 3720, 3906, 4099, 4340, 4464, 5040, 5208, 5580, 6510, 7440, 7812, 8198, 8680, 9765, 10416, 11160, 12297, 13020, 15624, 16396, 17360, 19530, 20495, 22320, 24594, 26040, 28693, 31248, 32792, 36891, 39060, 40990, 49188, 52080, 57386, 61485, 65584, 73782, 78120, 81980, 86079, 98376, 114772, 122970, 127069, 143465, 147564, 156240, 163960, 172158, 184455, 196752, 229544, 245940, 254138, 258237, 286930, 295128, 327920, 344316, 368910, 381207, 430395, 459088, 491880, 508276, 516474, 573860, 590256, 635345, 688632, 737820, 762414, 860790, 889483, 983760, 1016552, 1032948, 1143621, 1147720, 1270690, 1291185, 1377264, 1475640, 1524828, 1721580, 1778966, 1906035, 2033104, 2065896, 2287242, 2295440, 2541380, 2582370, 2668449, 2951280, 3049656, 3443160, 3557932, 3812070, 4131792, 4447415, 4574484, 5082760, 5164740, 5336898, 5718105, 6099312, 6886320, 7115864, 7624140, 8005347, 8894830, 9148968, 10165520, 10329480, 10673796, 11436210, 13342245, 14231728, 15248280, 16010694, 17789660, 18297936, 20658960, 21347592, 22872420, 26684490, 30496560, 32021388, 35579320, 40026735, 42695184, 45744840, 53368980, 64042776, 71158640, 80053470, 91489680, 106737960, 128085552, 160106940, 213475920, 320213880, 640427760]

約数ペア:

[(1, 640427760), (2, 320213880), (3, 213475920), (4, 160106940), (5, 128085552), (6, 106737960), (7, 91489680), (8, 80053470), (9, 71158640), (10, 64042776), (12, 53368980), (14, 45744840), (15, 42695184), (16, 40026735), (18, 35579320), (20, 32021388), (21, 30496560), (24, 26684490), (28, 22872420), (30, 21347592), (31, 20658960), (35, 18297936), (36, 17789660), (40, 16010694), (42, 15248280), (45, 14231728), (48, 13342245), (56, 11436210), (60, 10673796), (62, 10329480), (63, 10165520), (70, 9148968), (72, 8894830), (80, 8005347), (84, 7624140), (90, 7115864), (93, 6886320), (105, 6099312), (112, 5718105), (120, 5336898), (124, 5164740), (126, 5082760), (140, 4574484), (144, 4447415), (155, 4131792), (168, 3812070), (180, 3557932), (186, 3443160), (210, 3049656), (217, 2951280), (240, 2668449), (248, 2582370), (252, 2541380), (279, 2295440), (280, 2287242), (310, 2065896), (315, 2033104), (336, 1906035), (360, 1778966), (372, 1721580), (420, 1524828), (434, 1475640), (465, 1377264), (496, 1291185), (504, 1270690), (558, 1147720), (560, 1143621), (620, 1032948), (630, 1016552), (651, 983760), (720, 889483), (744, 860790), (840, 762414), (868, 737820), (930, 688632), (1008, 635345), (1085, 590256), (1116, 573860), (1240, 516474), (1260, 508276), (1302, 491880), (1395, 459088), (1488, 430395), (1680, 381207), (1736, 368910), (1860, 344316), (1953, 327920), (2170, 295128), (2232, 286930), (2480, 258237), (2520, 254138), (2604, 245940), (2790, 229544), (3255, 196752), (3472, 184455), (3720, 172158), (3906, 163960), (4099, 156240), (4340, 147564), (4464, 143465), (5040, 127069), (5208, 122970), (5580, 114772), (6510, 98376), (7440, 86079), (7812, 81980), (8198, 78120), (8680, 73782), (9765, 65584), (10416, 61485), (11160, 57386), (12297, 52080), (13020, 49188), (15624, 40990), (16396, 39060), (17360, 36891), (19530, 32792), (20495, 31248), (22320, 28693), (24594, 26040)]