21505920

素因数分解:

$2^7\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{487}}^1$

素因数の和:532

約数の個数: 128

約数和(自身を含む): 71677440

約数和(自身を除く): 50171520

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 23, 24, 30, 32, 40, 46, 48, 60, 64, 69, 80, 92, 96, 115, 120, 128, 138, 160, 184, 192, 230, 240, 276, 320, 345, 368, 384, 460, 480, 487, 552, 640, 690, 736, 920, 960, 974, 1104, 1380, 1461, 1472, 1840, 1920, 1948, 2208, 2435, 2760, 2922, 2944, 3680, 3896, 4416, 4870, 5520, 5844, 7305, 7360, 7792, 8832, 9740, 11040, 11201, 11688, 14610, 14720, 15584, 19480, 22080, 22402, 23376, 29220, 31168, 33603, 38960, 44160, 44804, 46752, 56005, 58440, 62336, 67206, 77920, 89608, 93504, 112010, 116880, 134412, 155840, 168015, 179216, 187008, 224020, 233760, 268824, 311680, 336030, 358432, 448040, 467520, 537648, 672060, 716864, 896080, 935040, 1075296, 1344120, 1433728, 1792160, 2150592, 2688240, 3584320, 4301184, 5376480, 7168640, 10752960, 21505920]

約数ペア:

[(1, 21505920), (2, 10752960), (3, 7168640), (4, 5376480), (5, 4301184), (6, 3584320), (8, 2688240), (10, 2150592), (12, 1792160), (15, 1433728), (16, 1344120), (20, 1075296), (23, 935040), (24, 896080), (30, 716864), (32, 672060), (40, 537648), (46, 467520), (48, 448040), (60, 358432), (64, 336030), (69, 311680), (80, 268824), (92, 233760), (96, 224020), (115, 187008), (120, 179216), (128, 168015), (138, 155840), (160, 134412), (184, 116880), (192, 112010), (230, 93504), (240, 89608), (276, 77920), (320, 67206), (345, 62336), (368, 58440), (384, 56005), (460, 46752), (480, 44804), (487, 44160), (552, 38960), (640, 33603), (690, 31168), (736, 29220), (920, 23376), (960, 22402), (974, 22080), (1104, 19480), (1380, 15584), (1461, 14720), (1472, 14610), (1840, 11688), (1920, 11201), (1948, 11040), (2208, 9740), (2435, 8832), (2760, 7792), (2922, 7360), (2944, 7305), (3680, 5844), (3896, 5520), (4416, 4870)]