19720415

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{27581}}^1$

素因数の和:27610

約数の個数: 16

約数和(自身を含む): 27802656

約数和(自身を除く): 8082241

約数列:

[1, 5, 11, 13, 55, 65, 143, 715, 27581, 137905, 303391, 358553, 1516955, 1792765, 3944083, 19720415]

約数ペア:

[(1, 19720415), (5, 3944083), (11, 1792765), (13, 1516955), (55, 358553), (65, 303391), (143, 137905), (715, 27581)]