21027167

素因数分解:

$7^1\times {\mathrm{19}}^2\times {\mathrm{53}}^1\times {\mathrm{157}}^1$

素因数の和:255

約数の個数: 24

約数和(自身を含む): 26005536

約数和(自身を除く): 4978369

約数列:

[1, 7, 19, 53, 133, 157, 361, 371, 1007, 1099, 2527, 2983, 7049, 8321, 19133, 20881, 56677, 58247, 133931, 158099, 396739, 1106693, 3003881, 21027167]

約数ペア:

[(1, 21027167), (7, 3003881), (19, 1106693), (53, 396739), (133, 158099), (157, 133931), (361, 58247), (371, 56677), (1007, 20881), (1099, 19133), (2527, 8321), (2983, 7049)]