20897912

素因数分解:

$2^3\times 7^2\times {\mathrm{89}}^1\times {\mathrm{599}}^1$

素因数の和:708

約数の個数: 48

約数和(自身を含む): 46170000

約数和(自身を除く): 25272088

約数列:

[1, 2, 4, 7, 8, 14, 28, 49, 56, 89, 98, 178, 196, 356, 392, 599, 623, 712, 1198, 1246, 2396, 2492, 4193, 4361, 4792, 4984, 8386, 8722, 16772, 17444, 29351, 33544, 34888, 53311, 58702, 106622, 117404, 213244, 234808, 373177, 426488, 746354, 1492708, 2612239, 2985416, 5224478, 10448956, 20897912]

約数ペア:

[(1, 20897912), (2, 10448956), (4, 5224478), (7, 2985416), (8, 2612239), (14, 1492708), (28, 746354), (49, 426488), (56, 373177), (89, 234808), (98, 213244), (178, 117404), (196, 106622), (356, 58702), (392, 53311), (599, 34888), (623, 33544), (712, 29351), (1198, 17444), (1246, 16772), (2396, 8722), (2492, 8386), (4193, 4984), (4361, 4792)]