21047760

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1$

素因数の和:114

約数の個数: 240

約数和(自身を含む): 77995008

約数和(自身を除く): 56947248

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 23, 24, 30, 31, 36, 40, 41, 45, 46, 48, 60, 62, 69, 72, 80, 82, 90, 92, 93, 115, 120, 123, 124, 138, 144, 155, 164, 180, 184, 186, 205, 207, 230, 240, 246, 248, 276, 279, 310, 328, 345, 360, 368, 369, 372, 410, 414, 460, 465, 492, 496, 552, 558, 615, 620, 656, 690, 713, 720, 738, 744, 820, 828, 920, 930, 943, 984, 1035, 1104, 1116, 1230, 1240, 1271, 1380, 1395, 1426, 1476, 1488, 1640, 1656, 1840, 1845, 1860, 1886, 1968, 2070, 2139, 2232, 2460, 2480, 2542, 2760, 2790, 2829, 2852, 2952, 3280, 3312, 3565, 3690, 3720, 3772, 3813, 4140, 4278, 4464, 4715, 4920, 5084, 5520, 5580, 5658, 5704, 5904, 6355, 6417, 7130, 7380, 7440, 7544, 7626, 8280, 8487, 8556, 9430, 9840, 10168, 10695, 11160, 11316, 11408, 11439, 12710, 12834, 14145, 14260, 14760, 15088, 15252, 16560, 16974, 17112, 18860, 19065, 20336, 21390, 22320, 22632, 22878, 25420, 25668, 28290, 28520, 29233, 29520, 30504, 32085, 33948, 34224, 37720, 38130, 42435, 42780, 45264, 45756, 50840, 51336, 56580, 57040, 57195, 58466, 61008, 64170, 67896, 75440, 76260, 84870, 85560, 87699, 91512, 101680, 102672, 113160, 114390, 116932, 128340, 135792, 146165, 152520, 169740, 171120, 175398, 183024, 226320, 228780, 233864, 256680, 263097, 292330, 305040, 339480, 350796, 438495, 457560, 467728, 513360, 526194, 584660, 678960, 701592, 876990, 915120, 1052388, 1169320, 1315485, 1403184, 1753980, 2104776, 2338640, 2630970, 3507960, 4209552, 5261940, 7015920, 10523880, 21047760]

約数ペア:

[(1, 21047760), (2, 10523880), (3, 7015920), (4, 5261940), (5, 4209552), (6, 3507960), (8, 2630970), (9, 2338640), (10, 2104776), (12, 1753980), (15, 1403184), (16, 1315485), (18, 1169320), (20, 1052388), (23, 915120), (24, 876990), (30, 701592), (31, 678960), (36, 584660), (40, 526194), (41, 513360), (45, 467728), (46, 457560), (48, 438495), (60, 350796), (62, 339480), (69, 305040), (72, 292330), (80, 263097), (82, 256680), (90, 233864), (92, 228780), (93, 226320), (115, 183024), (120, 175398), (123, 171120), (124, 169740), (138, 152520), (144, 146165), (155, 135792), (164, 128340), (180, 116932), (184, 114390), (186, 113160), (205, 102672), (207, 101680), (230, 91512), (240, 87699), (246, 85560), (248, 84870), (276, 76260), (279, 75440), (310, 67896), (328, 64170), (345, 61008), (360, 58466), (368, 57195), (369, 57040), (372, 56580), (410, 51336), (414, 50840), (460, 45756), (465, 45264), (492, 42780), (496, 42435), (552, 38130), (558, 37720), (615, 34224), (620, 33948), (656, 32085), (690, 30504), (713, 29520), (720, 29233), (738, 28520), (744, 28290), (820, 25668), (828, 25420), (920, 22878), (930, 22632), (943, 22320), (984, 21390), (1035, 20336), (1104, 19065), (1116, 18860), (1230, 17112), (1240, 16974), (1271, 16560), (1380, 15252), (1395, 15088), (1426, 14760), (1476, 14260), (1488, 14145), (1640, 12834), (1656, 12710), (1840, 11439), (1845, 11408), (1860, 11316), (1886, 11160), (1968, 10695), (2070, 10168), (2139, 9840), (2232, 9430), (2460, 8556), (2480, 8487), (2542, 8280), (2760, 7626), (2790, 7544), (2829, 7440), (2852, 7380), (2952, 7130), (3280, 6417), (3312, 6355), (3565, 5904), (3690, 5704), (3720, 5658), (3772, 5580), (3813, 5520), (4140, 5084), (4278, 4920), (4464, 4715)]