21137501

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{223}}^1\times {\mathrm{1231}}^1$

素因数の和:1472

約数の個数: 16

約数和(自身を含む): 26492928

約数和(自身を除く): 5355427

約数列:

[1, 7, 11, 77, 223, 1231, 1561, 2453, 8617, 13541, 17171, 94787, 274513, 1921591, 3019643, 21137501]

約数ペア:

[(1, 21137501), (7, 3019643), (11, 1921591), (77, 274513), (223, 94787), (1231, 17171), (1561, 13541), (2453, 8617)]