19978518

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{475679}}^1$

素因数の和:475691

約数の個数: 16

約数和(自身を含む): 45665280

約数和(自身を除く): 25686762

約数列:

[1, 2, 3, 6, 7, 14, 21, 42, 475679, 951358, 1427037, 2854074, 3329753, 6659506, 9989259, 19978518]

約数ペア:

[(1, 19978518), (2, 9989259), (3, 6659506), (6, 3329753), (7, 2854074), (14, 1427037), (21, 951358), (42, 475679)]