21047382

素因数分解:

$2^1\times 3^2\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{383}}^1$

素因数の和:505

約数の個数: 48

約数和(自身を含む): 47443968

約数和(自身を除く): 26396586

約数列:

[1, 2, 3, 6, 9, 18, 43, 71, 86, 129, 142, 213, 258, 383, 387, 426, 639, 766, 774, 1149, 1278, 2298, 3053, 3447, 6106, 6894, 9159, 16469, 18318, 27193, 27477, 32938, 49407, 54386, 54954, 81579, 98814, 148221, 163158, 244737, 296442, 489474, 1169299, 2338598, 3507897, 7015794, 10523691, 21047382]

約数ペア:

[(1, 21047382), (2, 10523691), (3, 7015794), (6, 3507897), (9, 2338598), (18, 1169299), (43, 489474), (71, 296442), (86, 244737), (129, 163158), (142, 148221), (213, 98814), (258, 81579), (383, 54954), (387, 54386), (426, 49407), (639, 32938), (766, 27477), (774, 27193), (1149, 18318), (1278, 16469), (2298, 9159), (3053, 6894), (3447, 6106)]