21457891

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{6373}}^1$

素因数の和:6430

約数の個数: 16

約数和(自身を含む): 27127744

約数和(自身を除く): 5669853

約数列:

[1, 7, 13, 37, 91, 259, 481, 3367, 6373, 44611, 82849, 235801, 579943, 1650607, 3065413, 21457891]

約数ペア:

[(1, 21457891), (7, 3065413), (13, 1650607), (37, 579943), (91, 235801), (259, 82849), (481, 44611), (3367, 6373)]