20386821

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{1409}}^1$

素因数の和:1485

約数の個数: 32

約数和(自身を含む): 34110720

約数和(自身を除く): 13723899

約数列:

[1, 3, 7, 13, 21, 39, 53, 91, 159, 273, 371, 689, 1113, 1409, 2067, 4227, 4823, 9863, 14469, 18317, 29589, 54951, 74677, 128219, 224031, 384657, 522739, 970801, 1568217, 2912403, 6795607, 20386821]

約数ペア:

[(1, 20386821), (3, 6795607), (7, 2912403), (13, 1568217), (21, 970801), (39, 522739), (53, 384657), (91, 224031), (159, 128219), (273, 74677), (371, 54951), (689, 29589), (1113, 18317), (1409, 14469), (2067, 9863), (4227, 4823)]