21740313

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^2\times {\mathrm{103}}^1$

素因数の和:178

約数の個数: 48

約数和(自身を含む): 36807680

約数和(自身を除く): 15067367

約数列:

[1, 3, 7, 19, 21, 23, 57, 69, 103, 133, 161, 309, 399, 437, 483, 529, 721, 1311, 1587, 1957, 2163, 2369, 3059, 3703, 5871, 7107, 9177, 10051, 11109, 13699, 16583, 30153, 41097, 45011, 49749, 54487, 70357, 135033, 163461, 211071, 315077, 381409, 945231, 1035253, 1144227, 3105759, 7246771, 21740313]

約数ペア:

[(1, 21740313), (3, 7246771), (7, 3105759), (19, 1144227), (21, 1035253), (23, 945231), (57, 381409), (69, 315077), (103, 211071), (133, 163461), (161, 135033), (309, 70357), (399, 54487), (437, 49749), (483, 45011), (529, 41097), (721, 30153), (1311, 16583), (1587, 13699), (1957, 11109), (2163, 10051), (2369, 9177), (3059, 7107), (3703, 5871)]