81072719

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{991}}^1$

素因数の和:1071

約数の個数: 32

約数和(自身を含む): 106659840

約数和(自身を除く): 25587121

約数列:

[1, 7, 13, 29, 31, 91, 203, 217, 377, 403, 899, 991, 2639, 2821, 6293, 6937, 11687, 12883, 28739, 30721, 81809, 90181, 201173, 215047, 373607, 399373, 890909, 2615249, 2795611, 6236363, 11581817, 81072719]

約数ペア:

[(1, 81072719), (7, 11581817), (13, 6236363), (29, 2795611), (31, 2615249), (91, 890909), (203, 399373), (217, 373607), (377, 215047), (403, 201173), (899, 90181), (991, 81809), (2639, 30721), (2821, 28739), (6293, 12883), (6937, 11687)]