20505765

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{1213}}^1$

素因数の和:1258

約数の個数: 48

約数和(自身を含む): 39858048

約数和(自身を除く): 19352283

約数列:

[1, 3, 5, 7, 15, 21, 23, 35, 49, 69, 105, 115, 147, 161, 245, 345, 483, 735, 805, 1127, 1213, 2415, 3381, 3639, 5635, 6065, 8491, 16905, 18195, 25473, 27899, 42455, 59437, 83697, 127365, 139495, 178311, 195293, 297185, 418485, 585879, 891555, 976465, 1367051, 2929395, 4101153, 6835255, 20505765]

約数ペア:

[(1, 20505765), (3, 6835255), (5, 4101153), (7, 2929395), (15, 1367051), (21, 976465), (23, 891555), (35, 585879), (49, 418485), (69, 297185), (105, 195293), (115, 178311), (147, 139495), (161, 127365), (245, 83697), (345, 59437), (483, 42455), (735, 27899), (805, 25473), (1127, 18195), (1213, 16905), (2415, 8491), (3381, 6065), (3639, 5635)]