21255680

素因数分解:

$2^9\times 5^1\times {\mathrm{19}}^2\times {\mathrm{23}}^1$

素因数の和:84

約数の個数: 120

約数和(自身を含む): 56125872

約数和(自身を除く): 34870192

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 23, 32, 38, 40, 46, 64, 76, 80, 92, 95, 115, 128, 152, 160, 184, 190, 230, 256, 304, 320, 361, 368, 380, 437, 460, 512, 608, 640, 722, 736, 760, 874, 920, 1216, 1280, 1444, 1472, 1520, 1748, 1805, 1840, 2185, 2432, 2560, 2888, 2944, 3040, 3496, 3610, 3680, 4370, 4864, 5776, 5888, 6080, 6992, 7220, 7360, 8303, 8740, 9728, 11552, 11776, 12160, 13984, 14440, 14720, 16606, 17480, 23104, 24320, 27968, 28880, 29440, 33212, 34960, 41515, 46208, 48640, 55936, 57760, 58880, 66424, 69920, 83030, 92416, 111872, 115520, 132848, 139840, 166060, 184832, 223744, 231040, 265696, 279680, 332120, 462080, 531392, 559360, 664240, 924160, 1062784, 1118720, 1328480, 2125568, 2656960, 4251136, 5313920, 10627840, 21255680]

約数ペア:

[(1, 21255680), (2, 10627840), (4, 5313920), (5, 4251136), (8, 2656960), (10, 2125568), (16, 1328480), (19, 1118720), (20, 1062784), (23, 924160), (32, 664240), (38, 559360), (40, 531392), (46, 462080), (64, 332120), (76, 279680), (80, 265696), (92, 231040), (95, 223744), (115, 184832), (128, 166060), (152, 139840), (160, 132848), (184, 115520), (190, 111872), (230, 92416), (256, 83030), (304, 69920), (320, 66424), (361, 58880), (368, 57760), (380, 55936), (437, 48640), (460, 46208), (512, 41515), (608, 34960), (640, 33212), (722, 29440), (736, 28880), (760, 27968), (874, 24320), (920, 23104), (1216, 17480), (1280, 16606), (1444, 14720), (1472, 14440), (1520, 13984), (1748, 12160), (1805, 11776), (1840, 11552), (2185, 9728), (2432, 8740), (2560, 8303), (2888, 7360), (2944, 7220), (3040, 6992), (3496, 6080), (3610, 5888), (3680, 5776), (4370, 4864)]