21903076

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{32401}}^1$

素因数の和:32431

約数の個数: 18

約数和(自身を含む): 41506962

約数和(自身を除く): 19603886

約数列:

[1, 2, 4, 13, 26, 52, 169, 338, 676, 32401, 64802, 129604, 421213, 842426, 1684852, 5475769, 10951538, 21903076]

約数ペア:

[(1, 21903076), (2, 10951538), (4, 5475769), (13, 1684852), (26, 842426), (52, 421213), (169, 129604), (338, 64802), (676, 32401)]