21247807

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{131}}^1$

素因数の和:231

約数の個数: 32

約数和(自身を含む): 27371520

約数和(自身を除く): 6123713

約数列:

[1, 7, 17, 29, 47, 119, 131, 203, 329, 493, 799, 917, 1363, 2227, 3451, 3799, 5593, 6157, 9541, 15589, 23171, 26593, 43099, 64583, 104669, 162197, 178553, 452081, 732683, 1249871, 3035401, 21247807]

約数ペア:

[(1, 21247807), (7, 3035401), (17, 1249871), (29, 732683), (47, 452081), (119, 178553), (131, 162197), (203, 104669), (329, 64583), (493, 43099), (799, 26593), (917, 23171), (1363, 15589), (2227, 9541), (3451, 6157), (3799, 5593)]