20912612

素因数分解:

$2^2\times 7^2\times {\mathrm{23}}^1\times {\mathrm{4639}}^1$

素因数の和:4680

約数の個数: 36

約数和(自身を含む): 44432640

約数和(自身を除く): 23520028

約数列:

[1, 2, 4, 7, 14, 23, 28, 46, 49, 92, 98, 161, 196, 322, 644, 1127, 2254, 4508, 4639, 9278, 18556, 32473, 64946, 106697, 129892, 213394, 227311, 426788, 454622, 746879, 909244, 1493758, 2987516, 5228153, 10456306, 20912612]

約数ペア:

[(1, 20912612), (2, 10456306), (4, 5228153), (7, 2987516), (14, 1493758), (23, 909244), (28, 746879), (46, 454622), (49, 426788), (92, 227311), (98, 213394), (161, 129892), (196, 106697), (322, 64946), (644, 32473), (1127, 18556), (2254, 9278), (4508, 4639)]