21491418

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{275531}}^1$

素因数の和:275549

約数の個数: 16

約数和(自身を含む): 46289376

約数和(自身を除く): 24797958

約数列:

[1, 2, 3, 6, 13, 26, 39, 78, 275531, 551062, 826593, 1653186, 3581903, 7163806, 10745709, 21491418]

約数ペア:

[(1, 21491418), (2, 10745709), (3, 7163806), (6, 3581903), (13, 1653186), (26, 826593), (39, 551062), (78, 275531)]