18719558

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1$

素因数の和:153

約数の個数: 64

約数和(自身を含む): 35622720

約数和(自身を除く): 16903162

約数列:

[1, 2, 11, 13, 22, 26, 29, 37, 58, 61, 74, 122, 143, 286, 319, 377, 407, 481, 638, 671, 754, 793, 814, 962, 1073, 1342, 1586, 1769, 2146, 2257, 3538, 4147, 4514, 5291, 8294, 8723, 10582, 11803, 13949, 17446, 19459, 22997, 23606, 24827, 27898, 29341, 38918, 45994, 49654, 58682, 65453, 130906, 153439, 252967, 306878, 322751, 505934, 645502, 719983, 850889, 1439966, 1701778, 9359779, 18719558]

約数ペア:

[(1, 18719558), (2, 9359779), (11, 1701778), (13, 1439966), (22, 850889), (26, 719983), (29, 645502), (37, 505934), (58, 322751), (61, 306878), (74, 252967), (122, 153439), (143, 130906), (286, 65453), (319, 58682), (377, 49654), (407, 45994), (481, 38918), (638, 29341), (671, 27898), (754, 24827), (793, 23606), (814, 22997), (962, 19459), (1073, 17446), (1342, 13949), (1586, 11803), (1769, 10582), (2146, 8723), (2257, 8294), (3538, 5291), (4147, 4514)]