20481120

素因数分解:

$2^5\times 3^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{431}}^1$

素因数の和:466

約数の個数: 192

約数和(自身を含む): 78382080

約数和(自身を除く): 57900960

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 16, 18, 20, 22, 24, 27, 30, 32, 33, 36, 40, 44, 45, 48, 54, 55, 60, 66, 72, 80, 88, 90, 96, 99, 108, 110, 120, 132, 135, 144, 160, 165, 176, 180, 198, 216, 220, 240, 264, 270, 288, 297, 330, 352, 360, 396, 431, 432, 440, 480, 495, 528, 540, 594, 660, 720, 792, 862, 864, 880, 990, 1056, 1080, 1188, 1293, 1320, 1440, 1485, 1584, 1724, 1760, 1980, 2155, 2160, 2376, 2586, 2640, 2970, 3168, 3448, 3879, 3960, 4310, 4320, 4741, 4752, 5172, 5280, 5940, 6465, 6896, 7758, 7920, 8620, 9482, 9504, 10344, 11637, 11880, 12930, 13792, 14223, 15516, 15840, 17240, 18964, 19395, 20688, 23274, 23705, 23760, 25860, 28446, 31032, 34480, 37928, 38790, 41376, 42669, 46548, 47410, 47520, 51720, 56892, 58185, 62064, 68960, 71115, 75856, 77580, 85338, 93096, 94820, 103440, 113784, 116370, 124128, 128007, 142230, 151712, 155160, 170676, 186192, 189640, 206880, 213345, 227568, 232740, 256014, 284460, 310320, 341352, 372384, 379280, 426690, 455136, 465480, 512028, 568920, 620640, 640035, 682704, 758560, 853380, 930960, 1024056, 1137840, 1280070, 1365408, 1706760, 1861920, 2048112, 2275680, 2560140, 3413520, 4096224, 5120280, 6827040, 10240560, 20481120]

約数ペア:

[(1, 20481120), (2, 10240560), (3, 6827040), (4, 5120280), (5, 4096224), (6, 3413520), (8, 2560140), (9, 2275680), (10, 2048112), (11, 1861920), (12, 1706760), (15, 1365408), (16, 1280070), (18, 1137840), (20, 1024056), (22, 930960), (24, 853380), (27, 758560), (30, 682704), (32, 640035), (33, 620640), (36, 568920), (40, 512028), (44, 465480), (45, 455136), (48, 426690), (54, 379280), (55, 372384), (60, 341352), (66, 310320), (72, 284460), (80, 256014), (88, 232740), (90, 227568), (96, 213345), (99, 206880), (108, 189640), (110, 186192), (120, 170676), (132, 155160), (135, 151712), (144, 142230), (160, 128007), (165, 124128), (176, 116370), (180, 113784), (198, 103440), (216, 94820), (220, 93096), (240, 85338), (264, 77580), (270, 75856), (288, 71115), (297, 68960), (330, 62064), (352, 58185), (360, 56892), (396, 51720), (431, 47520), (432, 47410), (440, 46548), (480, 42669), (495, 41376), (528, 38790), (540, 37928), (594, 34480), (660, 31032), (720, 28446), (792, 25860), (862, 23760), (864, 23705), (880, 23274), (990, 20688), (1056, 19395), (1080, 18964), (1188, 17240), (1293, 15840), (1320, 15516), (1440, 14223), (1485, 13792), (1584, 12930), (1724, 11880), (1760, 11637), (1980, 10344), (2155, 9504), (2160, 9482), (2376, 8620), (2586, 7920), (2640, 7758), (2970, 6896), (3168, 6465), (3448, 5940), (3879, 5280), (3960, 5172), (4310, 4752), (4320, 4741)]