21520678

素因数分解:

$2^1\times {\mathrm{61}}^1\times {\mathrm{419}}^1\times {\mathrm{421}}^1$

素因数の和:903

約数の個数: 16

約数和(自身を含む): 32966640

約数和(自身を除く): 11445962

約数列:

[1, 2, 61, 122, 419, 421, 838, 842, 25559, 25681, 51118, 51362, 176399, 352798, 10760339, 21520678]

約数ペア:

[(1, 21520678), (2, 10760339), (61, 352798), (122, 176399), (419, 51362), (421, 51118), (838, 25681), (842, 25559)]