21092869

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^2\times {\mathrm{491}}^1$

素因数の和:553

約数の個数: 24

約数和(自身を含む): 26993088

約数和(自身を除く): 5900219

約数列:

[1, 7, 17, 19, 119, 133, 323, 361, 491, 2261, 2527, 3437, 6137, 8347, 9329, 42959, 58429, 65303, 158593, 177251, 1110151, 1240757, 3013267, 21092869]

約数ペア:

[(1, 21092869), (7, 3013267), (17, 1240757), (19, 1110151), (119, 177251), (133, 158593), (323, 65303), (361, 58429), (491, 42959), (2261, 9329), (2527, 8347), (3437, 6137)]