21665889

素因数分解:

$3^2\times 7^2\times {\mathrm{73}}^1\times {\mathrm{673}}^1$

素因数の和:766

約数の個数: 36

約数和(自身を含む): 36958116

約数和(自身を除く): 15292227

約数列:

[1, 3, 7, 9, 21, 49, 63, 73, 147, 219, 441, 511, 657, 673, 1533, 2019, 3577, 4599, 4711, 6057, 10731, 14133, 32193, 32977, 42399, 49129, 98931, 147387, 296793, 343903, 442161, 1031709, 2407321, 3095127, 7221963, 21665889]

約数ペア:

[(1, 21665889), (3, 7221963), (7, 3095127), (9, 2407321), (21, 1031709), (49, 442161), (63, 343903), (73, 296793), (147, 147387), (219, 98931), (441, 49129), (511, 42399), (657, 32977), (673, 32193), (1533, 14133), (2019, 10731), (3577, 6057), (4599, 4711)]