21211520

素因数分解:

$2^7\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{131}}^1$

素因数の和:184

約数の個数: 128

約数和(自身を含む): 58164480

約数和(自身を除く): 36952960

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 23, 32, 40, 44, 46, 55, 64, 80, 88, 92, 110, 115, 128, 131, 160, 176, 184, 220, 230, 253, 262, 320, 352, 368, 440, 460, 506, 524, 640, 655, 704, 736, 880, 920, 1012, 1048, 1265, 1310, 1408, 1441, 1472, 1760, 1840, 2024, 2096, 2530, 2620, 2882, 2944, 3013, 3520, 3680, 4048, 4192, 5060, 5240, 5764, 6026, 7040, 7205, 7360, 8096, 8384, 10120, 10480, 11528, 12052, 14410, 14720, 15065, 16192, 16768, 20240, 20960, 23056, 24104, 28820, 30130, 32384, 33143, 40480, 41920, 46112, 48208, 57640, 60260, 66286, 80960, 83840, 92224, 96416, 115280, 120520, 132572, 161920, 165715, 184448, 192832, 230560, 241040, 265144, 331430, 385664, 461120, 482080, 530288, 662860, 922240, 964160, 1060576, 1325720, 1928320, 2121152, 2651440, 4242304, 5302880, 10605760, 21211520]

約数ペア:

[(1, 21211520), (2, 10605760), (4, 5302880), (5, 4242304), (8, 2651440), (10, 2121152), (11, 1928320), (16, 1325720), (20, 1060576), (22, 964160), (23, 922240), (32, 662860), (40, 530288), (44, 482080), (46, 461120), (55, 385664), (64, 331430), (80, 265144), (88, 241040), (92, 230560), (110, 192832), (115, 184448), (128, 165715), (131, 161920), (160, 132572), (176, 120520), (184, 115280), (220, 96416), (230, 92224), (253, 83840), (262, 80960), (320, 66286), (352, 60260), (368, 57640), (440, 48208), (460, 46112), (506, 41920), (524, 40480), (640, 33143), (655, 32384), (704, 30130), (736, 28820), (880, 24104), (920, 23056), (1012, 20960), (1048, 20240), (1265, 16768), (1310, 16192), (1408, 15065), (1441, 14720), (1472, 14410), (1760, 12052), (1840, 11528), (2024, 10480), (2096, 10120), (2530, 8384), (2620, 8096), (2882, 7360), (2944, 7205), (3013, 7040), (3520, 6026), (3680, 5764), (4048, 5240), (4192, 5060)]