21039328

素因数分解:

$2^5\times {\mathrm{31}}^1\times {\mathrm{127}}^1\times {\mathrm{167}}^1$

素因数の和:335

約数の個数: 48

約数和(自身を含む): 43352064

約数和(自身を除く): 22312736

約数列:

[1, 2, 4, 8, 16, 31, 32, 62, 124, 127, 167, 248, 254, 334, 496, 508, 668, 992, 1016, 1336, 2032, 2672, 3937, 4064, 5177, 5344, 7874, 10354, 15748, 20708, 21209, 31496, 41416, 42418, 62992, 82832, 84836, 125984, 165664, 169672, 339344, 657479, 678688, 1314958, 2629916, 5259832, 10519664, 21039328]

約数ペア:

[(1, 21039328), (2, 10519664), (4, 5259832), (8, 2629916), (16, 1314958), (31, 678688), (32, 657479), (62, 339344), (124, 169672), (127, 165664), (167, 125984), (248, 84836), (254, 82832), (334, 62992), (496, 42418), (508, 41416), (668, 31496), (992, 21209), (1016, 20708), (1336, 15748), (2032, 10354), (2672, 7874), (3937, 5344), (4064, 5177)]