20657040

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{83}}^1$

素因数の和:177

約数の個数: 160

約数和(自身を含む): 69745536

約数和(自身を除く): 49088496

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 17, 20, 24, 30, 34, 40, 48, 51, 60, 61, 68, 80, 83, 85, 102, 120, 122, 136, 166, 170, 183, 204, 240, 244, 249, 255, 272, 305, 332, 340, 366, 408, 415, 488, 498, 510, 610, 664, 680, 732, 816, 830, 915, 976, 996, 1020, 1037, 1220, 1245, 1328, 1360, 1411, 1464, 1660, 1830, 1992, 2040, 2074, 2440, 2490, 2822, 2928, 3111, 3320, 3660, 3984, 4080, 4148, 4233, 4880, 4980, 5063, 5185, 5644, 6222, 6640, 7055, 7320, 8296, 8466, 9960, 10126, 10370, 11288, 12444, 14110, 14640, 15189, 15555, 16592, 16932, 19920, 20252, 20740, 21165, 22576, 24888, 25315, 28220, 30378, 31110, 33864, 40504, 41480, 42330, 49776, 50630, 56440, 60756, 62220, 67728, 75945, 81008, 82960, 84660, 86071, 101260, 112880, 121512, 124440, 151890, 169320, 172142, 202520, 243024, 248880, 258213, 303780, 338640, 344284, 405040, 430355, 516426, 607560, 688568, 860710, 1032852, 1215120, 1291065, 1377136, 1721420, 2065704, 2582130, 3442840, 4131408, 5164260, 6885680, 10328520, 20657040]

約数ペア:

[(1, 20657040), (2, 10328520), (3, 6885680), (4, 5164260), (5, 4131408), (6, 3442840), (8, 2582130), (10, 2065704), (12, 1721420), (15, 1377136), (16, 1291065), (17, 1215120), (20, 1032852), (24, 860710), (30, 688568), (34, 607560), (40, 516426), (48, 430355), (51, 405040), (60, 344284), (61, 338640), (68, 303780), (80, 258213), (83, 248880), (85, 243024), (102, 202520), (120, 172142), (122, 169320), (136, 151890), (166, 124440), (170, 121512), (183, 112880), (204, 101260), (240, 86071), (244, 84660), (249, 82960), (255, 81008), (272, 75945), (305, 67728), (332, 62220), (340, 60756), (366, 56440), (408, 50630), (415, 49776), (488, 42330), (498, 41480), (510, 40504), (610, 33864), (664, 31110), (680, 30378), (732, 28220), (816, 25315), (830, 24888), (915, 22576), (976, 21165), (996, 20740), (1020, 20252), (1037, 19920), (1220, 16932), (1245, 16592), (1328, 15555), (1360, 15189), (1411, 14640), (1464, 14110), (1660, 12444), (1830, 11288), (1992, 10370), (2040, 10126), (2074, 9960), (2440, 8466), (2490, 8296), (2822, 7320), (2928, 7055), (3111, 6640), (3320, 6222), (3660, 5644), (3984, 5185), (4080, 5063), (4148, 4980), (4233, 4880)]