81764125

素因数分解:

$5^3\times {\mathrm{19}}^1\times {\mathrm{173}}^1\times {\mathrm{199}}^1$

素因数の和:406

約数の個数: 32

約数和(自身を含む): 108576000

約数和(自身を除く): 26811875

約数列:

[1, 5, 19, 25, 95, 125, 173, 199, 475, 865, 995, 2375, 3287, 3781, 4325, 4975, 16435, 18905, 21625, 24875, 34427, 82175, 94525, 172135, 410875, 472625, 654113, 860675, 3270565, 4303375, 16352825, 81764125]

約数ペア:

[(1, 81764125), (5, 16352825), (19, 4303375), (25, 3270565), (95, 860675), (125, 654113), (173, 472625), (199, 410875), (475, 172135), (865, 94525), (995, 82175), (2375, 34427), (3287, 24875), (3781, 21625), (4325, 18905), (4975, 16435)]