19728995

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{673}}^1$

素因数の和:743

約数の個数: 32

約数和(自身を含む): 28534464

約数和(自身を除く): 8805469

約数列:

[1, 5, 11, 13, 41, 55, 65, 143, 205, 451, 533, 673, 715, 2255, 2665, 3365, 5863, 7403, 8749, 27593, 29315, 37015, 43745, 96239, 137965, 303523, 358709, 481195, 1517615, 1793545, 3945799, 19728995]

約数ペア:

[(1, 19728995), (5, 3945799), (11, 1793545), (13, 1517615), (41, 481195), (55, 358709), (65, 303523), (143, 137965), (205, 96239), (451, 43745), (533, 37015), (673, 29315), (715, 27593), (2255, 8749), (2665, 7403), (3365, 5863)]