19980415

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43913}}^1$

素因数の和:43938

約数の個数: 16

約数和(自身を含む): 29510208

約数和(自身を除く): 9529793

約数列:

[1, 5, 7, 13, 35, 65, 91, 455, 43913, 219565, 307391, 570869, 1536955, 2854345, 3996083, 19980415]

約数ペア:

[(1, 19980415), (5, 3996083), (7, 2854345), (13, 1536955), (35, 570869), (65, 307391), (91, 219565), (455, 43913)]