20504160

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{491}}^1$

素因数の和:541

約数の個数: 144

約数和(自身を含む): 72530640

約数和(自身を除く): 52026480

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 29, 30, 32, 36, 40, 45, 48, 58, 60, 72, 80, 87, 90, 96, 116, 120, 144, 145, 160, 174, 180, 232, 240, 261, 288, 290, 348, 360, 435, 464, 480, 491, 522, 580, 696, 720, 870, 928, 982, 1044, 1160, 1305, 1392, 1440, 1473, 1740, 1964, 2088, 2320, 2455, 2610, 2784, 2946, 3480, 3928, 4176, 4419, 4640, 4910, 5220, 5892, 6960, 7365, 7856, 8352, 8838, 9820, 10440, 11784, 13920, 14239, 14730, 15712, 17676, 19640, 20880, 22095, 23568, 28478, 29460, 35352, 39280, 41760, 42717, 44190, 47136, 56956, 58920, 70704, 71195, 78560, 85434, 88380, 113912, 117840, 128151, 141408, 142390, 170868, 176760, 213585, 227824, 235680, 256302, 284780, 341736, 353520, 427170, 455648, 512604, 569560, 640755, 683472, 707040, 854340, 1025208, 1139120, 1281510, 1366944, 1708680, 2050416, 2278240, 2563020, 3417360, 4100832, 5126040, 6834720, 10252080, 20504160]

約数ペア:

[(1, 20504160), (2, 10252080), (3, 6834720), (4, 5126040), (5, 4100832), (6, 3417360), (8, 2563020), (9, 2278240), (10, 2050416), (12, 1708680), (15, 1366944), (16, 1281510), (18, 1139120), (20, 1025208), (24, 854340), (29, 707040), (30, 683472), (32, 640755), (36, 569560), (40, 512604), (45, 455648), (48, 427170), (58, 353520), (60, 341736), (72, 284780), (80, 256302), (87, 235680), (90, 227824), (96, 213585), (116, 176760), (120, 170868), (144, 142390), (145, 141408), (160, 128151), (174, 117840), (180, 113912), (232, 88380), (240, 85434), (261, 78560), (288, 71195), (290, 70704), (348, 58920), (360, 56956), (435, 47136), (464, 44190), (480, 42717), (491, 41760), (522, 39280), (580, 35352), (696, 29460), (720, 28478), (870, 23568), (928, 22095), (982, 20880), (1044, 19640), (1160, 17676), (1305, 15712), (1392, 14730), (1440, 14239), (1473, 13920), (1740, 11784), (1964, 10440), (2088, 9820), (2320, 8838), (2455, 8352), (2610, 7856), (2784, 7365), (2946, 6960), (3480, 5892), (3928, 5220), (4176, 4910), (4419, 4640)]