21145291255

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{271}}^1\times {\mathrm{7129}}^1$

素因数の和:7615

約数の個数: 32

約数和(自身を含む): 27926784000

約数和(自身を除く): 6781492745

約数列:

[1, 5, 11, 55, 199, 271, 995, 1355, 2189, 2981, 7129, 10945, 14905, 35645, 53929, 78419, 269645, 392095, 593219, 1418671, 1931959, 2966095, 7093355, 9659795, 15605381, 21251549, 78026905, 106257745, 384459841, 1922299205, 4229058251, 21145291255]

約数ペア:

[(1, 21145291255), (5, 4229058251), (11, 1922299205), (55, 384459841), (199, 106257745), (271, 78026905), (995, 21251549), (1355, 15605381), (2189, 9659795), (2981, 7093355), (7129, 2966095), (10945, 1931959), (14905, 1418671), (35645, 593219), (53929, 392095), (78419, 269645)]