20123145

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{193}}^1\times {\mathrm{331}}^1$

素因数の和:542

約数の個数: 48

約数和(自身を含む): 40190592

約数和(自身を除く): 20067447

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 193, 315, 331, 579, 965, 993, 1351, 1655, 1737, 2317, 2895, 2979, 4053, 4965, 6755, 6951, 8685, 11585, 12159, 14895, 20265, 20853, 34755, 60795, 63883, 104265, 191649, 319415, 447181, 574947, 958245, 1341543, 2235905, 2874735, 4024629, 6707715, 20123145]

約数ペア:

[(1, 20123145), (3, 6707715), (5, 4024629), (7, 2874735), (9, 2235905), (15, 1341543), (21, 958245), (35, 574947), (45, 447181), (63, 319415), (105, 191649), (193, 104265), (315, 63883), (331, 60795), (579, 34755), (965, 20853), (993, 20265), (1351, 14895), (1655, 12159), (1737, 11585), (2317, 8685), (2895, 6951), (2979, 6755), (4053, 4965)]