20217596

素因数分解:

$2^2\times 7^2\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{89}}^1$

素因数の和:187

約数の個数: 72

約数和(自身を含む): 44528400

約数和(自身を除く): 24310804

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 49, 61, 76, 89, 98, 122, 133, 178, 196, 244, 266, 356, 427, 532, 623, 854, 931, 1159, 1246, 1691, 1708, 1862, 2318, 2492, 2989, 3382, 3724, 4361, 4636, 5429, 5978, 6764, 8113, 8722, 10858, 11837, 11956, 16226, 17444, 21716, 23674, 32452, 38003, 47348, 56791, 76006, 82859, 103151, 113582, 152012, 165718, 206302, 227164, 266021, 331436, 412604, 532042, 722057, 1064084, 1444114, 2888228, 5054399, 10108798, 20217596]

約数ペア:

[(1, 20217596), (2, 10108798), (4, 5054399), (7, 2888228), (14, 1444114), (19, 1064084), (28, 722057), (38, 532042), (49, 412604), (61, 331436), (76, 266021), (89, 227164), (98, 206302), (122, 165718), (133, 152012), (178, 113582), (196, 103151), (244, 82859), (266, 76006), (356, 56791), (427, 47348), (532, 38003), (623, 32452), (854, 23674), (931, 21716), (1159, 17444), (1246, 16226), (1691, 11956), (1708, 11837), (1862, 10858), (2318, 8722), (2492, 8113), (2989, 6764), (3382, 5978), (3724, 5429), (4361, 4636)]