21137557

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{1543}}^1$

素因数の和:1672

約数の個数: 16

約数和(自身を含む): 25692160

約数和(自身を除く): 4554603

約数列:

[1, 7, 19, 103, 133, 721, 1543, 1957, 10801, 13699, 29317, 158929, 205219, 1112503, 3019651, 21137557]

約数ペア:

[(1, 21137557), (7, 3019651), (19, 1112503), (103, 205219), (133, 158929), (721, 29317), (1543, 13699), (1957, 10801)]