18690021

素因数分解:

$3^4\times 7^2\times {\mathrm{17}}^1\times {\mathrm{277}}^1$

素因数の和:320

約数の個数: 60

約数和(自身を含む): 34512588

約数和(自身を除く): 15822567

約数列:

[1, 3, 7, 9, 17, 21, 27, 49, 51, 63, 81, 119, 147, 153, 189, 277, 357, 441, 459, 567, 831, 833, 1071, 1323, 1377, 1939, 2493, 2499, 3213, 3969, 4709, 5817, 7479, 7497, 9639, 13573, 14127, 17451, 22437, 22491, 32963, 40719, 42381, 52353, 67473, 98889, 122157, 127143, 157059, 230741, 296667, 366471, 381429, 692223, 890001, 1099413, 2076669, 2670003, 6230007, 18690021]

約数ペア:

[(1, 18690021), (3, 6230007), (7, 2670003), (9, 2076669), (17, 1099413), (21, 890001), (27, 692223), (49, 381429), (51, 366471), (63, 296667), (81, 230741), (119, 157059), (147, 127143), (153, 122157), (189, 98889), (277, 67473), (357, 52353), (441, 42381), (459, 40719), (567, 32963), (831, 22491), (833, 22437), (1071, 17451), (1323, 14127), (1377, 13573), (1939, 9639), (2493, 7497), (2499, 7479), (3213, 5817), (3969, 4709)]