21171555

素因数分解:

$3^2\times 5^1\times {\mathrm{107}}^1\times {\mathrm{4397}}^1$

素因数の和:4515

約数の個数: 24

約数和(自身を含む): 37048752

約数和(自身を除く): 15877197

約数列:

[1, 3, 5, 9, 15, 45, 107, 321, 535, 963, 1605, 4397, 4815, 13191, 21985, 39573, 65955, 197865, 470479, 1411437, 2352395, 4234311, 7057185, 21171555]

約数ペア:

[(1, 21171555), (3, 7057185), (5, 4234311), (9, 2352395), (15, 1411437), (45, 470479), (107, 197865), (321, 65955), (535, 39573), (963, 21985), (1605, 13191), (4397, 4815)]