1581425

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{61}}^2$

素因数の和:149

約数の個数: 18

約数和(自身を含む): 2110914

約数和(自身を除く): 529489

約数列:

[1, 5, 17, 25, 61, 85, 305, 425, 1037, 1525, 3721, 5185, 18605, 25925, 63257, 93025, 316285, 1581425]

約数ペア:

[(1, 1581425), (5, 316285), (17, 93025), (25, 63257), (61, 25925), (85, 18605), (305, 5185), (425, 3721), (1037, 1525)]