21287903

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{1453}}^1$

素因数の和:1503

約数の個数: 24

約数和(自身を含む): 27847008

約数和(自身を除く): 6559105

約数列:

[1, 7, 13, 23, 49, 91, 161, 299, 637, 1127, 1453, 2093, 10171, 14651, 18889, 33419, 71197, 132223, 233933, 434447, 925561, 1637531, 3041129, 21287903]

約数ペア:

[(1, 21287903), (7, 3041129), (13, 1637531), (23, 925561), (49, 434447), (91, 233933), (161, 132223), (299, 71197), (637, 33419), (1127, 18889), (1453, 14651), (2093, 10171)]