81365725

素因数分解:

$5^2\times 7^2\times {\mathrm{127}}^1\times {\mathrm{523}}^1$

素因数の和:674

約数の個数: 36

約数和(自身を含む): 118516224

約数和(自身を除く): 37150499

約数列:

[1, 5, 7, 25, 35, 49, 127, 175, 245, 523, 635, 889, 1225, 2615, 3175, 3661, 4445, 6223, 13075, 18305, 22225, 25627, 31115, 66421, 91525, 128135, 155575, 332105, 464947, 640675, 1660525, 2324735, 3254629, 11623675, 16273145, 81365725]

約数ペア:

[(1, 81365725), (5, 16273145), (7, 11623675), (25, 3254629), (35, 2324735), (49, 1660525), (127, 640675), (175, 464947), (245, 332105), (523, 155575), (635, 128135), (889, 91525), (1225, 66421), (2615, 31115), (3175, 25627), (3661, 22225), (4445, 18305), (6223, 13075)]