19912518

素因数分解:

$2^1\times 3^2\times {\mathrm{71}}^1\times {\mathrm{15581}}^1$

素因数の和:15660

約数の個数: 24

約数和(自身を含む): 43754256

約数和(自身を除く): 23841738

約数列:

[1, 2, 3, 6, 9, 18, 71, 142, 213, 426, 639, 1278, 15581, 31162, 46743, 93486, 140229, 280458, 1106251, 2212502, 3318753, 6637506, 9956259, 19912518]

約数ペア:

[(1, 19912518), (2, 9956259), (3, 6637506), (6, 3318753), (9, 2212502), (18, 1106251), (71, 280458), (142, 140229), (213, 93486), (426, 46743), (639, 31162), (1278, 15581)]