1991125

素因数分解:

$5^3\times {\mathrm{17}}^1\times {\mathrm{937}}^1$

素因数の和:969

約数の個数: 16

約数和(自身を含む): 2633904

約数和(自身を除く): 642779

約数列:

[1, 5, 17, 25, 85, 125, 425, 937, 2125, 4685, 15929, 23425, 79645, 117125, 398225, 1991125]

約数ペア:

[(1, 1991125), (5, 398225), (17, 117125), (25, 79645), (85, 23425), (125, 15929), (425, 4685), (937, 2125)]