20645667

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{521}}^1$

素因数の和:588

約数の個数: 48

約数和(自身を含む): 37132992

約数和(自身を除く): 16487325

約数列:

[1, 3, 7, 9, 17, 21, 37, 51, 63, 111, 119, 153, 259, 333, 357, 521, 629, 777, 1071, 1563, 1887, 2331, 3647, 4403, 4689, 5661, 8857, 10941, 13209, 19277, 26571, 32823, 39627, 57831, 61999, 79713, 134939, 173493, 185997, 327709, 404817, 557991, 983127, 1214451, 2293963, 2949381, 6881889, 20645667]

約数ペア:

[(1, 20645667), (3, 6881889), (7, 2949381), (9, 2293963), (17, 1214451), (21, 983127), (37, 557991), (51, 404817), (63, 327709), (111, 185997), (119, 173493), (153, 134939), (259, 79713), (333, 61999), (357, 57831), (521, 39627), (629, 32823), (777, 26571), (1071, 19277), (1563, 13209), (1887, 10941), (2331, 8857), (3647, 5661), (4403, 4689)]