1991375

素因数分解:

$5^3\times {\mathrm{89}}^1\times {\mathrm{179}}^1$

素因数の和:283

約数の個数: 16

約数和(自身を含む): 2527200

約数和(自身を除く): 535825

約数列:

[1, 5, 25, 89, 125, 179, 445, 895, 2225, 4475, 11125, 15931, 22375, 79655, 398275, 1991375]

約数ペア:

[(1, 1991375), (5, 398275), (25, 79655), (89, 22375), (125, 15931), (179, 11125), (445, 4475), (895, 2225)]