21505680

素因数分解:

$2^4\times 3^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{251}}^1$

素因数の和:294

約数の個数: 240

約数和(自身を含む): 87744384

約数和(自身を除く): 66238704

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 17, 18, 20, 21, 24, 28, 30, 34, 35, 36, 40, 42, 45, 48, 51, 56, 60, 63, 68, 70, 72, 80, 84, 85, 90, 102, 105, 112, 119, 120, 126, 136, 140, 144, 153, 168, 170, 180, 204, 210, 238, 240, 251, 252, 255, 272, 280, 306, 315, 336, 340, 357, 360, 408, 420, 476, 502, 504, 510, 560, 595, 612, 630, 680, 714, 720, 753, 765, 816, 840, 952, 1004, 1008, 1020, 1071, 1190, 1224, 1255, 1260, 1360, 1428, 1506, 1530, 1680, 1757, 1785, 1904, 2008, 2040, 2142, 2259, 2380, 2448, 2510, 2520, 2856, 3012, 3060, 3514, 3570, 3765, 4016, 4080, 4267, 4284, 4518, 4760, 5020, 5040, 5271, 5355, 5712, 6024, 6120, 7028, 7140, 7530, 8534, 8568, 8785, 9036, 9520, 10040, 10542, 10710, 11295, 12048, 12240, 12801, 14056, 14280, 15060, 15813, 17068, 17136, 17570, 18072, 20080, 21084, 21335, 21420, 22590, 25602, 26355, 28112, 28560, 29869, 30120, 31626, 34136, 35140, 36144, 38403, 42168, 42670, 42840, 45180, 51204, 52710, 59738, 60240, 63252, 64005, 68272, 70280, 76806, 79065, 84336, 85340, 85680, 89607, 90360, 102408, 105420, 119476, 126504, 128010, 140560, 149345, 153612, 158130, 170680, 179214, 180720, 192015, 204816, 210840, 238952, 253008, 256020, 268821, 298690, 307224, 316260, 341360, 358428, 384030, 421680, 448035, 477904, 512040, 537642, 597380, 614448, 632520, 716856, 768060, 896070, 1024080, 1075284, 1194760, 1265040, 1344105, 1433712, 1536120, 1792140, 2150568, 2389520, 2688210, 3072240, 3584280, 4301136, 5376420, 7168560, 10752840, 21505680]

約数ペア:

[(1, 21505680), (2, 10752840), (3, 7168560), (4, 5376420), (5, 4301136), (6, 3584280), (7, 3072240), (8, 2688210), (9, 2389520), (10, 2150568), (12, 1792140), (14, 1536120), (15, 1433712), (16, 1344105), (17, 1265040), (18, 1194760), (20, 1075284), (21, 1024080), (24, 896070), (28, 768060), (30, 716856), (34, 632520), (35, 614448), (36, 597380), (40, 537642), (42, 512040), (45, 477904), (48, 448035), (51, 421680), (56, 384030), (60, 358428), (63, 341360), (68, 316260), (70, 307224), (72, 298690), (80, 268821), (84, 256020), (85, 253008), (90, 238952), (102, 210840), (105, 204816), (112, 192015), (119, 180720), (120, 179214), (126, 170680), (136, 158130), (140, 153612), (144, 149345), (153, 140560), (168, 128010), (170, 126504), (180, 119476), (204, 105420), (210, 102408), (238, 90360), (240, 89607), (251, 85680), (252, 85340), (255, 84336), (272, 79065), (280, 76806), (306, 70280), (315, 68272), (336, 64005), (340, 63252), (357, 60240), (360, 59738), (408, 52710), (420, 51204), (476, 45180), (502, 42840), (504, 42670), (510, 42168), (560, 38403), (595, 36144), (612, 35140), (630, 34136), (680, 31626), (714, 30120), (720, 29869), (753, 28560), (765, 28112), (816, 26355), (840, 25602), (952, 22590), (1004, 21420), (1008, 21335), (1020, 21084), (1071, 20080), (1190, 18072), (1224, 17570), (1255, 17136), (1260, 17068), (1360, 15813), (1428, 15060), (1506, 14280), (1530, 14056), (1680, 12801), (1757, 12240), (1785, 12048), (1904, 11295), (2008, 10710), (2040, 10542), (2142, 10040), (2259, 9520), (2380, 9036), (2448, 8785), (2510, 8568), (2520, 8534), (2856, 7530), (3012, 7140), (3060, 7028), (3514, 6120), (3570, 6024), (3765, 5712), (4016, 5355), (4080, 5271), (4267, 5040), (4284, 5020), (4518, 4760)]