20645205

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{353}}^1\times {\mathrm{557}}^1$

素因数の和:925

約数の個数: 32

約数和(自身を含む): 37926144

約数和(自身を除く): 17280939

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 353, 557, 1059, 1671, 1765, 2471, 2785, 3899, 5295, 7413, 8355, 11697, 12355, 19495, 37065, 58485, 196621, 589863, 983105, 1376347, 2949315, 4129041, 6881735, 20645205]

約数ペア:

[(1, 20645205), (3, 6881735), (5, 4129041), (7, 2949315), (15, 1376347), (21, 983105), (35, 589863), (105, 196621), (353, 58485), (557, 37065), (1059, 19495), (1671, 12355), (1765, 11697), (2471, 8355), (2785, 7413), (3899, 5295)]