20940885

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{9497}}^1$

素因数の和:9522

約数の個数: 36

約数和(自身を含む): 42228108

約数和(自身を除く): 21287223

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 49, 63, 105, 147, 245, 315, 441, 735, 2205, 9497, 28491, 47485, 66479, 85473, 142455, 199437, 332395, 427365, 465353, 598311, 997185, 1396059, 2326765, 2991555, 4188177, 6980295, 20940885]

約数ペア:

[(1, 20940885), (3, 6980295), (5, 4188177), (7, 2991555), (9, 2326765), (15, 1396059), (21, 997185), (35, 598311), (45, 465353), (49, 427365), (63, 332395), (105, 199437), (147, 142455), (245, 85473), (315, 66479), (441, 47485), (735, 28491), (2205, 9497)]