21903903

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{631}}^1$

素因数の和:692

約数の個数: 48

約数和(自身を含む): 39436800

約数和(自身を除く): 17532897

約数列:

[1, 3, 7, 9, 19, 21, 29, 57, 63, 87, 133, 171, 203, 261, 399, 551, 609, 631, 1197, 1653, 1827, 1893, 3857, 4417, 4959, 5679, 11571, 11989, 13251, 18299, 34713, 35967, 39753, 54897, 83923, 107901, 128093, 164691, 251769, 347681, 384279, 755307, 1043043, 1152837, 2433767, 3129129, 7301301, 21903903]

約数ペア:

[(1, 21903903), (3, 7301301), (7, 3129129), (9, 2433767), (19, 1152837), (21, 1043043), (29, 755307), (57, 384279), (63, 347681), (87, 251769), (133, 164691), (171, 128093), (203, 107901), (261, 83923), (399, 54897), (551, 39753), (609, 35967), (631, 34713), (1197, 18299), (1653, 13251), (1827, 11989), (1893, 11571), (3857, 5679), (4417, 4959)]