21378952

素因数分解:

$2^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{283}}^1$

素因数の和:386

約数の個数: 64

約数和(自身を含む): 49075200

約数和(自身を除く): 27696248

約数列:

[1, 2, 4, 7, 8, 14, 19, 28, 38, 56, 71, 76, 133, 142, 152, 266, 283, 284, 497, 532, 566, 568, 994, 1064, 1132, 1349, 1981, 1988, 2264, 2698, 3962, 3976, 5377, 5396, 7924, 9443, 10754, 10792, 15848, 18886, 20093, 21508, 37639, 37772, 40186, 43016, 75278, 75544, 80372, 140651, 150556, 160744, 281302, 301112, 381767, 562604, 763534, 1125208, 1527068, 2672369, 3054136, 5344738, 10689476, 21378952]

約数ペア:

[(1, 21378952), (2, 10689476), (4, 5344738), (7, 3054136), (8, 2672369), (14, 1527068), (19, 1125208), (28, 763534), (38, 562604), (56, 381767), (71, 301112), (76, 281302), (133, 160744), (142, 150556), (152, 140651), (266, 80372), (283, 75544), (284, 75278), (497, 43016), (532, 40186), (566, 37772), (568, 37639), (994, 21508), (1064, 20093), (1132, 18886), (1349, 15848), (1981, 10792), (1988, 10754), (2264, 9443), (2698, 7924), (3962, 5396), (3976, 5377)]