21509040

素因数分解:

$2^4\times 3^1\times 5^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{59}}^1$

素因数の和:120

約数の個数: 240

約数和(自身を含む): 81423360

約数和(自身を除く): 59914320

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 31, 35, 40, 42, 48, 49, 56, 59, 60, 62, 70, 80, 84, 93, 98, 105, 112, 118, 120, 124, 140, 147, 155, 168, 177, 186, 196, 210, 217, 236, 240, 245, 248, 280, 294, 295, 310, 336, 354, 372, 392, 413, 420, 434, 465, 472, 490, 496, 560, 588, 590, 620, 651, 708, 735, 744, 784, 826, 840, 868, 885, 930, 944, 980, 1085, 1176, 1180, 1239, 1240, 1302, 1416, 1470, 1488, 1519, 1652, 1680, 1736, 1770, 1829, 1860, 1960, 2065, 2170, 2352, 2360, 2478, 2480, 2604, 2832, 2891, 2940, 3038, 3255, 3304, 3472, 3540, 3658, 3720, 3920, 4130, 4340, 4557, 4720, 4956, 5208, 5487, 5782, 5880, 6076, 6195, 6510, 6608, 7080, 7316, 7440, 7595, 8260, 8673, 8680, 9114, 9145, 9912, 10416, 10974, 11564, 11760, 12152, 12390, 12803, 13020, 14160, 14455, 14632, 15190, 16520, 17346, 17360, 18228, 18290, 19824, 21948, 22785, 23128, 24304, 24780, 25606, 26040, 27435, 28910, 29264, 30380, 33040, 34692, 36456, 36580, 38409, 43365, 43896, 45570, 46256, 49560, 51212, 52080, 54870, 57820, 60760, 64015, 69384, 72912, 73160, 76818, 86730, 87792, 89621, 91140, 99120, 102424, 109740, 115640, 121520, 128030, 138768, 146320, 153636, 173460, 179242, 182280, 192045, 204848, 219480, 231280, 256060, 268863, 307272, 346920, 358484, 364560, 384090, 438960, 448105, 512120, 537726, 614544, 693840, 716968, 768180, 896210, 1024240, 1075452, 1344315, 1433936, 1536360, 1792420, 2150904, 2688630, 3072720, 3584840, 4301808, 5377260, 7169680, 10754520, 21509040]

約数ペア:

[(1, 21509040), (2, 10754520), (3, 7169680), (4, 5377260), (5, 4301808), (6, 3584840), (7, 3072720), (8, 2688630), (10, 2150904), (12, 1792420), (14, 1536360), (15, 1433936), (16, 1344315), (20, 1075452), (21, 1024240), (24, 896210), (28, 768180), (30, 716968), (31, 693840), (35, 614544), (40, 537726), (42, 512120), (48, 448105), (49, 438960), (56, 384090), (59, 364560), (60, 358484), (62, 346920), (70, 307272), (80, 268863), (84, 256060), (93, 231280), (98, 219480), (105, 204848), (112, 192045), (118, 182280), (120, 179242), (124, 173460), (140, 153636), (147, 146320), (155, 138768), (168, 128030), (177, 121520), (186, 115640), (196, 109740), (210, 102424), (217, 99120), (236, 91140), (240, 89621), (245, 87792), (248, 86730), (280, 76818), (294, 73160), (295, 72912), (310, 69384), (336, 64015), (354, 60760), (372, 57820), (392, 54870), (413, 52080), (420, 51212), (434, 49560), (465, 46256), (472, 45570), (490, 43896), (496, 43365), (560, 38409), (588, 36580), (590, 36456), (620, 34692), (651, 33040), (708, 30380), (735, 29264), (744, 28910), (784, 27435), (826, 26040), (840, 25606), (868, 24780), (885, 24304), (930, 23128), (944, 22785), (980, 21948), (1085, 19824), (1176, 18290), (1180, 18228), (1239, 17360), (1240, 17346), (1302, 16520), (1416, 15190), (1470, 14632), (1488, 14455), (1519, 14160), (1652, 13020), (1680, 12803), (1736, 12390), (1770, 12152), (1829, 11760), (1860, 11564), (1960, 10974), (2065, 10416), (2170, 9912), (2352, 9145), (2360, 9114), (2478, 8680), (2480, 8673), (2604, 8260), (2832, 7595), (2891, 7440), (2940, 7316), (3038, 7080), (3255, 6608), (3304, 6510), (3472, 6195), (3540, 6076), (3658, 5880), (3720, 5782), (3920, 5487), (4130, 5208), (4340, 4956), (4557, 4720)]