21977884

素因数分解:

$2^2\times {\mathrm{31}}^1\times {\mathrm{421}}^2$

素因数の和:877

約数の個数: 18

約数和(自身を含む): 39796512

約数和(自身を除く): 17818628

約数列:

[1, 2, 4, 31, 62, 124, 421, 842, 1684, 13051, 26102, 52204, 177241, 354482, 708964, 5494471, 10988942, 21977884]

約数ペア:

[(1, 21977884), (2, 10988942), (4, 5494471), (31, 708964), (62, 354482), (124, 177241), (421, 52204), (842, 26102), (1684, 13051)]