21515520

素因数分解:

$2^8\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{431}}^1$

素因数の和:468

約数の個数: 144

約数和(自身を含む): 74172672

約数和(自身を除く): 52657152

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 32, 39, 40, 48, 52, 60, 64, 65, 78, 80, 96, 104, 120, 128, 130, 156, 160, 192, 195, 208, 240, 256, 260, 312, 320, 384, 390, 416, 431, 480, 520, 624, 640, 768, 780, 832, 862, 960, 1040, 1248, 1280, 1293, 1560, 1664, 1724, 1920, 2080, 2155, 2496, 2586, 3120, 3328, 3448, 3840, 4160, 4310, 4992, 5172, 5603, 6240, 6465, 6896, 8320, 8620, 9984, 10344, 11206, 12480, 12930, 13792, 16640, 16809, 17240, 20688, 22412, 24960, 25860, 27584, 28015, 33618, 34480, 41376, 44824, 49920, 51720, 55168, 56030, 67236, 68960, 82752, 84045, 89648, 103440, 110336, 112060, 134472, 137920, 165504, 168090, 179296, 206880, 224120, 268944, 275840, 331008, 336180, 358592, 413760, 448240, 537888, 551680, 672360, 717184, 827520, 896480, 1075776, 1344720, 1434368, 1655040, 1792960, 2151552, 2689440, 3585920, 4303104, 5378880, 7171840, 10757760, 21515520]

約数ペア:

[(1, 21515520), (2, 10757760), (3, 7171840), (4, 5378880), (5, 4303104), (6, 3585920), (8, 2689440), (10, 2151552), (12, 1792960), (13, 1655040), (15, 1434368), (16, 1344720), (20, 1075776), (24, 896480), (26, 827520), (30, 717184), (32, 672360), (39, 551680), (40, 537888), (48, 448240), (52, 413760), (60, 358592), (64, 336180), (65, 331008), (78, 275840), (80, 268944), (96, 224120), (104, 206880), (120, 179296), (128, 168090), (130, 165504), (156, 137920), (160, 134472), (192, 112060), (195, 110336), (208, 103440), (240, 89648), (256, 84045), (260, 82752), (312, 68960), (320, 67236), (384, 56030), (390, 55168), (416, 51720), (431, 49920), (480, 44824), (520, 41376), (624, 34480), (640, 33618), (768, 28015), (780, 27584), (832, 25860), (862, 24960), (960, 22412), (1040, 20688), (1248, 17240), (1280, 16809), (1293, 16640), (1560, 13792), (1664, 12930), (1724, 12480), (1920, 11206), (2080, 10344), (2155, 9984), (2496, 8620), (2586, 8320), (3120, 6896), (3328, 6465), (3448, 6240), (3840, 5603), (4160, 5172), (4310, 4992)]