21320884

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{263}}^1\times {\mathrm{1559}}^1$

素因数の和:1839

約数の個数: 24

約数和(自身を含む): 40360320

約数和(自身を除く): 19039436

約数列:

[1, 2, 4, 13, 26, 52, 263, 526, 1052, 1559, 3118, 3419, 6236, 6838, 13676, 20267, 40534, 81068, 410017, 820034, 1640068, 5330221, 10660442, 21320884]

約数ペア:

[(1, 21320884), (2, 10660442), (4, 5330221), (13, 1640068), (26, 820034), (52, 410017), (263, 81068), (526, 40534), (1052, 20267), (1559, 13676), (3118, 6838), (3419, 6236)]