81375

素因数分解:

$3^1\times 5^3\times 7^1\times {\mathrm{31}}^1$

素因数の和:56

約数の個数: 32

約数和(自身を含む): 159744

約数和(自身を除く): 78369

約数列:

[1, 3, 5, 7, 15, 21, 25, 31, 35, 75, 93, 105, 125, 155, 175, 217, 375, 465, 525, 651, 775, 875, 1085, 2325, 2625, 3255, 3875, 5425, 11625, 16275, 27125, 81375]

約数ペア:

[(1, 81375), (3, 27125), (5, 16275), (7, 11625), (15, 5425), (21, 3875), (25, 3255), (31, 2625), (35, 2325), (75, 1085), (93, 875), (105, 775), (125, 651), (155, 525), (175, 465), (217, 375)]