21349965

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{15641}}^1$

素因数の和:15669

約数の個数: 32

約数和(自身を含む): 42045696

約数和(自身を除く): 20695731

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 65, 91, 105, 195, 273, 455, 1365, 15641, 46923, 78205, 109487, 203333, 234615, 328461, 547435, 609999, 1016665, 1423331, 1642305, 3049995, 4269993, 7116655, 21349965]

約数ペア:

[(1, 21349965), (3, 7116655), (5, 4269993), (7, 3049995), (13, 1642305), (15, 1423331), (21, 1016665), (35, 609999), (39, 547435), (65, 328461), (91, 234615), (105, 203333), (195, 109487), (273, 78205), (455, 46923), (1365, 15641)]