21697137

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{131}}^1\times {\mathrm{239}}^1$

素因数の和:394

約数の個数: 48

約数和(自身を含む): 39536640

約数和(自身を除く): 17839503

約数列:

[1, 3, 7, 9, 11, 21, 33, 63, 77, 99, 131, 231, 239, 393, 693, 717, 917, 1179, 1441, 1673, 2151, 2629, 2751, 4323, 5019, 7887, 8253, 10087, 12969, 15057, 18403, 23661, 30261, 31309, 55209, 90783, 93927, 165627, 219163, 281781, 344399, 657489, 1033197, 1972467, 2410793, 3099591, 7232379, 21697137]

約数ペア:

[(1, 21697137), (3, 7232379), (7, 3099591), (9, 2410793), (11, 1972467), (21, 1033197), (33, 657489), (63, 344399), (77, 281781), (99, 219163), (131, 165627), (231, 93927), (239, 90783), (393, 55209), (693, 31309), (717, 30261), (917, 23661), (1179, 18403), (1441, 15057), (1673, 12969), (2151, 10087), (2629, 8253), (2751, 7887), (4323, 5019)]