20518461

素因数分解:

$3^3\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1$

素因数の和:135

約数の個数: 64

約数和(自身を含む): 35020800

約数和(自身を除く): 14502339

約数列:

[1, 3, 9, 19, 23, 27, 37, 47, 57, 69, 111, 141, 171, 207, 333, 423, 437, 513, 621, 703, 851, 893, 999, 1081, 1269, 1311, 1739, 2109, 2553, 2679, 3243, 3933, 5217, 6327, 7659, 8037, 9729, 11799, 15651, 16169, 18981, 20539, 22977, 24111, 29187, 33041, 39997, 46953, 48507, 61617, 99123, 119991, 145521, 184851, 297369, 359973, 436563, 554553, 759943, 892107, 1079919, 2279829, 6839487, 20518461]

約数ペア:

[(1, 20518461), (3, 6839487), (9, 2279829), (19, 1079919), (23, 892107), (27, 759943), (37, 554553), (47, 436563), (57, 359973), (69, 297369), (111, 184851), (141, 145521), (171, 119991), (207, 99123), (333, 61617), (423, 48507), (437, 46953), (513, 39997), (621, 33041), (703, 29187), (851, 24111), (893, 22977), (999, 20539), (1081, 18981), (1269, 16169), (1311, 15651), (1739, 11799), (2109, 9729), (2553, 8037), (2679, 7659), (3243, 6327), (3933, 5217)]