20979840

素因数分解:

$2^7\times 3^1\times 5^1\times 7^2\times {\mathrm{223}}^1$

素因数の和:259

約数の個数: 192

約数和(自身を含む): 78140160

約数和(自身を除く): 57160320

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 32, 35, 40, 42, 48, 49, 56, 60, 64, 70, 80, 84, 96, 98, 105, 112, 120, 128, 140, 147, 160, 168, 192, 196, 210, 223, 224, 240, 245, 280, 294, 320, 336, 384, 392, 420, 446, 448, 480, 490, 560, 588, 640, 669, 672, 735, 784, 840, 892, 896, 960, 980, 1115, 1120, 1176, 1338, 1344, 1470, 1561, 1568, 1680, 1784, 1920, 1960, 2230, 2240, 2352, 2676, 2688, 2940, 3122, 3136, 3345, 3360, 3568, 3920, 4460, 4480, 4683, 4704, 5352, 5880, 6244, 6272, 6690, 6720, 7136, 7805, 7840, 8920, 9366, 9408, 10704, 10927, 11760, 12488, 13380, 13440, 14272, 15610, 15680, 17840, 18732, 18816, 21408, 21854, 23415, 23520, 24976, 26760, 28544, 31220, 31360, 32781, 35680, 37464, 42816, 43708, 46830, 47040, 49952, 53520, 54635, 62440, 65562, 71360, 74928, 85632, 87416, 93660, 94080, 99904, 107040, 109270, 124880, 131124, 142720, 149856, 163905, 174832, 187320, 199808, 214080, 218540, 249760, 262248, 299712, 327810, 349664, 374640, 428160, 437080, 499520, 524496, 599424, 655620, 699328, 749280, 874160, 999040, 1048992, 1311240, 1398656, 1498560, 1748320, 2097984, 2622480, 2997120, 3496640, 4195968, 5244960, 6993280, 10489920, 20979840]

約数ペア:

[(1, 20979840), (2, 10489920), (3, 6993280), (4, 5244960), (5, 4195968), (6, 3496640), (7, 2997120), (8, 2622480), (10, 2097984), (12, 1748320), (14, 1498560), (15, 1398656), (16, 1311240), (20, 1048992), (21, 999040), (24, 874160), (28, 749280), (30, 699328), (32, 655620), (35, 599424), (40, 524496), (42, 499520), (48, 437080), (49, 428160), (56, 374640), (60, 349664), (64, 327810), (70, 299712), (80, 262248), (84, 249760), (96, 218540), (98, 214080), (105, 199808), (112, 187320), (120, 174832), (128, 163905), (140, 149856), (147, 142720), (160, 131124), (168, 124880), (192, 109270), (196, 107040), (210, 99904), (223, 94080), (224, 93660), (240, 87416), (245, 85632), (280, 74928), (294, 71360), (320, 65562), (336, 62440), (384, 54635), (392, 53520), (420, 49952), (446, 47040), (448, 46830), (480, 43708), (490, 42816), (560, 37464), (588, 35680), (640, 32781), (669, 31360), (672, 31220), (735, 28544), (784, 26760), (840, 24976), (892, 23520), (896, 23415), (960, 21854), (980, 21408), (1115, 18816), (1120, 18732), (1176, 17840), (1338, 15680), (1344, 15610), (1470, 14272), (1561, 13440), (1568, 13380), (1680, 12488), (1784, 11760), (1920, 10927), (1960, 10704), (2230, 9408), (2240, 9366), (2352, 8920), (2676, 7840), (2688, 7805), (2940, 7136), (3122, 6720), (3136, 6690), (3345, 6272), (3360, 6244), (3568, 5880), (3920, 5352), (4460, 4704), (4480, 4683)]