21088815

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{5557}}^1$

素因数の和:5599

約数の個数: 32

約数和(自身を含む): 38416896

約数和(自身を除く): 17328081

約数列:

[1, 3, 5, 11, 15, 23, 33, 55, 69, 115, 165, 253, 345, 759, 1265, 3795, 5557, 16671, 27785, 61127, 83355, 127811, 183381, 305635, 383433, 639055, 916905, 1405921, 1917165, 4217763, 7029605, 21088815]

約数ペア:

[(1, 21088815), (3, 7029605), (5, 4217763), (11, 1917165), (15, 1405921), (23, 916905), (33, 639055), (55, 383433), (69, 305635), (115, 183381), (165, 127811), (253, 83355), (345, 61127), (759, 27785), (1265, 16671), (3795, 5557)]