20870872

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{487}}^2$

素因数の和:991

約数の個数: 24

約数和(自身を含む): 42778260

約数和(自身を除く): 21907388

約数列:

[1, 2, 4, 8, 11, 22, 44, 88, 487, 974, 1948, 3896, 5357, 10714, 21428, 42856, 237169, 474338, 948676, 1897352, 2608859, 5217718, 10435436, 20870872]

約数ペア:

[(1, 20870872), (2, 10435436), (4, 5217718), (8, 2608859), (11, 1897352), (22, 948676), (44, 474338), (88, 237169), (487, 42856), (974, 21428), (1948, 10714), (3896, 5357)]