20900355

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{6421}}^1$

素因数の和:6467

約数の個数: 32

約数和(自身を含む): 39456768

約数和(自身を除く): 18556413

約数列:

[1, 3, 5, 7, 15, 21, 31, 35, 93, 105, 155, 217, 465, 651, 1085, 3255, 6421, 19263, 32105, 44947, 96315, 134841, 199051, 224735, 597153, 674205, 995255, 1393357, 2985765, 4180071, 6966785, 20900355]

約数ペア:

[(1, 20900355), (3, 6966785), (5, 4180071), (7, 2985765), (15, 1393357), (21, 995255), (31, 674205), (35, 597153), (93, 224735), (105, 199051), (155, 134841), (217, 96315), (465, 44947), (651, 32105), (1085, 19263), (3255, 6421)]