21648004

素因数分解:

$2^2\times 7^2\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{89}}^1$

素因数の和:197

約数の個数: 72

約数和(自身を含む): 47832120

約数和(自身を除く): 26184116

約数列:

[1, 2, 4, 7, 14, 17, 28, 34, 49, 68, 73, 89, 98, 119, 146, 178, 196, 238, 292, 356, 476, 511, 623, 833, 1022, 1241, 1246, 1513, 1666, 2044, 2482, 2492, 3026, 3332, 3577, 4361, 4964, 6052, 6497, 7154, 8687, 8722, 10591, 12994, 14308, 17374, 17444, 21182, 25988, 34748, 42364, 45479, 60809, 74137, 90958, 110449, 121618, 148274, 181916, 220898, 243236, 296548, 318353, 441796, 636706, 773143, 1273412, 1546286, 3092572, 5412001, 10824002, 21648004]

約数ペア:

[(1, 21648004), (2, 10824002), (4, 5412001), (7, 3092572), (14, 1546286), (17, 1273412), (28, 773143), (34, 636706), (49, 441796), (68, 318353), (73, 296548), (89, 243236), (98, 220898), (119, 181916), (146, 148274), (178, 121618), (196, 110449), (238, 90958), (292, 74137), (356, 60809), (476, 45479), (511, 42364), (623, 34748), (833, 25988), (1022, 21182), (1241, 17444), (1246, 17374), (1513, 14308), (1666, 12994), (2044, 10591), (2482, 8722), (2492, 8687), (3026, 7154), (3332, 6497), (3577, 6052), (4361, 4964)]