21987654

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{281893}}^1$

素因数の和:281911

約数の個数: 16

約数和(自身を含む): 47358192

約数和(自身を除く): 25370538

約数列:

[1, 2, 3, 6, 13, 26, 39, 78, 281893, 563786, 845679, 1691358, 3664609, 7329218, 10993827, 21987654]

約数ペア:

[(1, 21987654), (2, 10993827), (3, 7329218), (6, 3664609), (13, 1691358), (26, 845679), (39, 563786), (78, 281893)]